Professor Harkesh B. Singh

Address with telephone/ fax/e-mail etc.:

Department of Chemistry

Indian Institute of Technology

Powai, Bombay 400 076, INDIA

Phone : (022) 25767190 (O)

           : (022) 25770675 (R)

Gram : Technology, Bombay-76

Telex : 011-72313 IITB IN

Fax    : 091-22-2572 3480, 2576 7152

email  : chhbsia[at]chem.iitb.ac.in  

 

Date of Birth

Education

1980-1983

 

 

 

1976-1979

 

 

 

 

1974-1976

 

1972-1974

March 1, 1956. Basti (U.P.)

 

Ph.D. Organometallic Chemistry

Research Advisor : Professor W.R. McWhinnie

Title: "Charge-Transfer in Organotellurium Chemistry"

Aston University, Birmingham, England

Ph.D.  Organometallic Chemistry

Research Advisor : Professor T.N. Srivastava

Title: Studies on Organotellurium Pseudohalides and related Derivatives Lucknow University, Lucknow

(Submitted in 1979, awarded in 1984)

M.Sc. Inorganic Chemistrty, Lucknow University

(Stood second in order of merit)

 

B.Sc. Lucknow University, Lucknow

Awards/Fellowships

1. National Scholarship for Studies Abroad by Ministry of Education, New Delhi 1979.

2. BOYS CAST Award by Department of Science and Technology, 1988.

3. Awarded the Royal Society of Chemistry Journal Grants for International Authors 1997.

4. Plenary lecture on Organochalcogen Chemistry at the 8th International Conference on the Chemistry of Selenium and Tellurium (8ICCST) Brazil, Aug., 6-11, 2000.

5. Dr. Singhs 1st Chem. Commun. Papers (J. Chem. Soc., Chem. Commun. 1991, 952) was cited in Applied Highlight Section of British Journal Chemistry and Industry (Page 804, 1991).

6. Elected Fellow of The National Academy of Sciences, (FNASc) Allahabad, India, 1998.

7. Elected Fellow of the Royal Society of Chemistry (CChem, FRSC), 1999.

8. UGC - Hari Om Trusts C. V. Raman award for 2001.

9. Chemical Research Society of India, Bronze Medal, 2003.

10. Advisory Board Member of Chemistry Letters published by Chemical Society of Japan since 2005.

11. Guest Editor, Proceedings of the Ninth International Conference on the Chemistry of Selenium and Tellurium (ICCST-9) published in Phosphorus, Sulfur, Silicon and the Related Elements , Vol 180, Numbers 3-4 (2005).

12.Awarded Ramanna Fellowship (DST) (2006).

13.Elected Fellow of the Indian Academy of Sciences, 2007.

14.Plenary lecture on Organochalocogen Chemistry at ICCST-10, 2007, Lodz, Poland.

15.Dharamsi Morarji Chemical co. Visiting Fellowship in Chemistry , 2007-2008, UICT Mumbais.

Memberships/Committees

1        Member, Programme Advisory Committee (PAC), Inorganic Chemistry, Department of Science and Technology (DST), New Delhi, since 1998-2004.

2        Member, Expert Committee of Fast Track Young scientists Scheme in Chemical Sciences since 2005.

3        Member of the International Advisory Board and Chairman, organizing committee for International Conference on the Chemistry of Selenium and Tellurium (ICCST-9) held at IIT Bombay, Feb'2004.

4        Member, Council of Chemical Research Society of India (March 2005-2008).

5        Convener, First SERC funded Winter School on Main Group Chemistry organized at IIT Bombay, March 18 30, 2002.

6        Member of the Indian Chemical Society, Calcutta.

7        Member, Board of Studies, Chemistry Department, Bombay University, 1993-1995 and 2002-todate.

8        Member, Board of Studies, Applied Chemistry, Institute of Technology, Banaras Hindu University (1997-2000).

9        Member Advisory Committee, Special Assistance Programme (SAP), UGC, Department of Chemistry, University of Dharwad.

10    Member, Project Review Committee, DMSRDE, Kanpur.

11    Member, Board of Studies, M. S. University, Baroda, 2002-2005.

12    UGC nominee for Advisory Committee of Center of Advanced Studies under Special Assistance Program (SAP), Department of Chemistry, University of Rajasthan, Jaipur (since 2005).

13    UGC nominee for SAP, Department of Chemistry, University of Madras (since 2005).

14    UGC nominee for SAP, Department of Chemistry, University of Pune (since 2006).

PROFESSIONAL EXPERIENCE

 

1980 (Jan.)-1983 (Oct)

 

1984 (Jan.)-1984 (July)

 

1984 (July) -.1987 (Nov.)

 

1987 (Nov.)-1990 (Nov.)

 

1988 (June)- 1988 (Dec.)

 

 

 1990 (Nov.)- 1995 (Aug.)

 

1995 (Aug.)

 

Research/Demonstrator, Department of Chemistry, Aston University, Birmingham, England.

Pool Scientist, working with Professor B.L. Khandelwal, Indian Institute of Technology, Delhi.

 

Lecturer, Department of Chemistry, Indian Institute of Technology, Bombay.

 

Assistant Professor, Department of Chemistry, Indian Institute of Technology, Bombay.

Visiting Research Scientist at Institute for Polymers and Organic Solids, Department of Chemistry / Physics (Professor Fred Wudl's Lab.), University of California, Santa Barbara, USA.

 

Associate Professor, Department of Chemistry, Indian Institute of Technology, Bombay.

 

Professor, Department of Chemistry, Indian Institute of Technology, Bombay.

 

TEACHING ACTIVITIES:

 

New UG Courses Developed:

            Prof. P. Mathur and I have introduced a M.Sc.level course on organometallic chemistry, (CH 547, Organometallic Chemistry).

            As Instructor in-Charge of the B.Tech first year course I have updated and developed the course in 1998, (CH 102, Chemistry II) (Spring).

 

New PG Courses Developed:

            CH 826/CH.578, Topics in Chemistry: As part of this course I have introduced a topic on Synthetic Metals (13-14 lectures per semester). This topic deals with the recent developments in the area of Molecular Conductors and Superconductors.

New Laboratory experiments introduced:

            I have been associated with modernisation of almost all Inorganic Laboratory Courses. In particular, I have introduced experiments on the preparation and characterisation of standard organometallic compounds to the M.Sc. students. These include, experiments on (a) allylpalladium chloride, ferrocene (CH 513L) and dichloro(1,5-cyclooctadien)palladium (II) (CH 432L). In addition, an experiment on the preparation and resolution of optically active cobalt complexes has been introduced to the M.Sc. final year students.

 

Laboratory Developed:

            I have developed a fairly good research laboratory for Synthetic Organometallic Chemistry. This has most of the commonly required facilities such as Controlled Atmosphere Box, N2 /Vac double line etc. In addition, facilities for room temperature and low temperature solid state conductivity measurements, electrochemical synthesis, cyclic voltammetry and crystal growth have been generated. These include procurement of a good Electrometer, Programmable Current Source, Automatic Temperature Controller and Cyclic Volammetry equipment.

 

RESEARCH AND DEVELOPMENT ACTIVITIES:

 

List of M.Sc., /B.Tech., Home Paper/Project supervised:

  1. Ajit R. Pradhan, (1986), M.Sc. Thesis Title: Charge- Transfer Complexes from Cyclic Tellurides and Ditellurides.
  2. Rachna Malhotra (1992), M.Sc. Thesis title: Synthesis of Organometallic Precursors for Metal-Organic Chemical Vapour Deposition (MOCVD) of Hg-Te.
  3. Shashi Vyas (1997), M.Sc. Thesis title: Organoselenium Compounds with Thiol Peroxidase Activity.
  4. Sandeep Apte (1999), M.Sc. Thesis title: Palladium Catalysed Cross-Coupling Reactions between Organoselenides and Alkenes.
  5. Kunal Chakrapani (1999), M.Sc. Thesis title: Catalytic Oxyselenenylation-Elimination Reaction using Diorgano Diselenides.
  6. Rashmi Mashram (1999), M.Sc. Thesis title:Studies on Redox Active Dichalcogenides as Glutathione Peroxidase Mimics.
  7. Mohan Singh (2000) M.Sc. Thesis title:" New selenium electrophiles for oxyselenylation reactions".
  8. Gomathy Chandrashekharan (2000) M.Sc. Thesis title: " Novel Organochalcogens for Cross-Coupling Reactions".
  9. P. S. S. Babu (2001) M.Sc. Thesis title. "Novel Complexes of Organotellurium Reagents for Cross-Coupling Reactions".
  10. Arnab Mukherjee (2003) M.Sc. Thesis title: Synthesis of Organoselenium compounds with SeX (X = Cl, S) Intramolecular Coordination
  11. Matibur Rahaman Zamadar (2005) Synthesis of Organoselenium Compounds with Intramolecular Interaction.
  12. Debasis Banerjee (2006) Chemistry of Molecular Selenium and Tellurium¿.
  13. Sayantani Das (2006) The Chemistry of Selenadiazoles¿.
  14. Goutam Mukherjee "The Chemistry of Selenadiazoles" (2007).
  15. Shreyashi Goswamy (2008) ¿ The Chemistry of Telluradiazoles¿.

 

Supervision of Candidates for M.Tech.

 

  1. Rajveni Vindyal (July 1989-91) Jointly with Dr. R. Srinivasa of Mateial Science centre. M.Tech Thesis title: Synthesis of Cadmium Telluride -Mercury Telluride Through Stoichiometric Organometallic Precursors.

 

List of Ph.D. Thesis supervised:

 

  1. Pawan K. Khanna (July 1984-Sept. 1989). Ph.D.Thesis title : Synthesis and Reactions of Ditellurides and Tellurides.
  2. N. Sudha (July 1985 - July 1989). Ph.D. Thesis Title : Studies on Organotellurium Derivatives of Synthetic Importance: Aryltellurenyl Halides and Telluronium Salts.
  3. S. Kalyan Kumar (Jan 1986 - Dec. 1991).Ph.D. Thesis Title: Synthesis and Characterisation of Organochalcogen p- Donors.
  4. A. Regini (Jan. 1987 - Jan. 1992). Ph.D. Thesis Title : Synthesis of Organotransition Metal Complexes with Tellurium Ligands.
  5. K. Rani (Jan. 1988-1993). Ph.D. Thesis title : Synthesis and Characterisation of Square Planar Transition Metal Dichalcogenes.
  6. Rupinder Kaur (July 1991 to Jan. 1996). Ph.D. Thesis Title:Intramolecularly Stabilized Organochalcogen (Se, Te) Ligands: Synthesis, Structure and Reactivity.
  7. Saija C. Menon (July 1991 to July 1996) Ph.D. Thesis Title: Synthesis, Structure and Reactivity of Novel Tellurium Ligands.
  8. E.V.K.Suresh Kumar (July 1993 to Feb. 1998) Ph.D. Thesis Title: Synthesis and Characterisation of Dithiaheterocycle-Annelated Tetrathiafulvalene Derivatives.
  9. G. Mugesh (July 1994 to July 1998) Ph.D.Thesis Title: Studies on Novel Organochalcogen Derivatives; Synthesis, Structure, Reactivity and Biomimetic Activity.
  10. Arunashree Panda (Jan 1995 to Dec. 99 Ph.D.Thesis Title: Novel Organochalcogen Derivatives : Ligands, Reagents and Thiol Peroxidase Mimics.
  11. Sanjio, S. Zade, (Dec. 1999 - 2004) Title of proposed Ph.D. Thesis: Novel Organoselenium Ligands: Role in Organic Synthesis.
  12. K. Kandasamy, (July 1999 - 2004) Title of proposed Ph.D. Thesis: "Synthesis of Lanthanide Chalcogenolates as MOCVD Precursors".
  13. Snigdha Panda, (July 1999 - 2004) Title of proposed Ph.D. Thesis: "Studies on Chalcogen Containing Macrocycles".
  14. Sangit Kumar, (July 1999 -2004) Title of proposed Ph.D. Thesis: "Biomimetic Studies of Novel Organochalcogen Derivatives".
  15. Upali Patel, (July 2000 -) Title of proposed thesis "Studies on organochalcogen macrocycles"

Ph.D Students under supervision:

  1. Sagar Sharma (July 2004-)
  2. Kriti Srivastava (Jan 2005-)
  3. K. Selvakumar(Jan 2005-)
  4. Tapash Chakraborty (Jan 2005-)
  5. Vijay Pal Singh (Jan 2006)
  6. Sudesh T Manjare (July 2006)
  7. Prakul Rakesh (July 2006-)
  8. Poonam Shah (July 2007-)

Post-Doctoral Fellows /Research Assistants

1.                  Dr. S. Kalyankumar (1991)

2.                  Dr. Jai Deo Singh (1990-93)

3.                  Dr. N. Sudha (1994)

4.                  Dr. Saija C. Menon (1996-97)

5.                  Dr. G. Mugesh (1998-1999)

6.                  Dr. Arunashree Panda (Feb.2000-July 2000)

7.                  Dr. Santosh Kumar Tripathi (July 2001-Sep 2004)

8.                  Sandeep Apte (July 1999-May 2000)

9.                  Anna Mukharjee (Nov.1999-May 2000)

10.              Urmila Patil (July 1999-May 2000)

11.              Rajesh Baligar (August 2005- June2007)

12.              Goutom Mukherjee (May 2007-)

 

Sponsored Research Projects:

1        Title: New organic conductors and superconductors based on tellurium materials. Funding agency : BRNS, DAE. Grant - in - aid : Rs. 2,40,000/ (Jan. 1986 - Sept. 1989).

2        Title: Synthesis of low-dimensional conductors based on bis(ditellurolene) metal anions where metal = Ni, Pd, Pt. Funding agency : CSIR , New Delhi Grant-in-aid : Rs. 3,59,800/- (Jan, 1986 - March 1989).

3        Title: Design, synthesis and characterisation of molecular conductors and superconductors. Funding agency : DST, Delhi Grant-in-aid : 5,74,706/- (June 1990 - June 94)

4        Title: Asymmetric catalysis: Role of tellurium ligands :Funding Agency : CSIR , New Delhi Grant-in-aid : 2,70,000/- (July 93 to Feb. 1997).

5        Title: Synthesis and characerisation of Gr. II-VI stoichiometric organometallics. Funding Agency : BRNS, DAE Grant-in-aid : 2,75,000/- (July 1994 to July 1998).

6        Title: Organochalcogen (Se/Te) Derivatives with Glutathione Peroxidase-like Activity, Royal Society of Chemistry, £500 (1997).

7        Title: Novel Ferrocene Derived Diselenides as Glutathione Peroxidase Mimics, Royal Society of Chemistry, £1000 (1998).

8        Title: Synthesis of Novel Organochalcogen Ligands and Their Applications in Organic Synthesis.Catalysis, DST, 15, 00, 000/- (July 1998 - 2002).

9        Title: Synthesis and Characterization of Single Source Precursors for the Preparation of Group II-VI semiconductor Materials Using MOCVD Technique, BRNS, 22, 00, 000/- (July 1999 - 2002).

10    Title: New Stable Reagents for the Sythesis of MOCVD Precursors Containing Metal-Chalcogen (Se/Te) Bonds, DMSRDE, Kanpur, 10, 00, 000/- (March 2000 onwards).

11    Title: "Synthesis of Novel Organochalcogens Stabilized by Intramolecular Chelation, DST, (January 2003 August 2006).

12    Title: "Synthesis and characterization of stable monomeric trivalent/divalent lanthanide chalcogenolates as a single source precursors for the preparation of lanthanide chalcogenides LnEx (E = S, Se, Te)¿, CSIR, 10 lakhs (February 2004- March 2007).

 

Ongoing Projects

1.   Title: Ramanna Fellowship , DST, 35 lakhs , (Jan 2007- )

 

Industrial interaction on an individual basis

  1. Project title : 2 Mercaptobenzothiazole.Funding agency : M/s. E. Merck (India) Ltd. Grant-in-aid : Rs. 10,000/- (April 1991 July 1991)
  2. Project Title : Development of a complex chelate of a mixture of amino acids. Funding Agency : Refnol, Resins and Chemicals Limited, Ahmedabad. Grant-in-Aid : Rs. 21,472 (July 1993-Dec. 1993) (Co-PI, Dr. C.P. Rao).

 

Group efforts with colleagues and students in research, design development and consultancy, if any:

I am actively collaborating with the following groups:

  1. MOCVD poroject: We are working on a long term collaborative research on MOCVD of Gr II-VI semiconductors with Dr. S. K. Kulshreshtha and Dr. R. P. Patel, BARC.
  2. Molecular Materials: Our group is actively collaborating with Dr. J.V. Yakhmi of TPPED Division, BARC on Molecular Materials such as molecular metals, superconductors and ferromagnets.
  3. X-Ray Crystallography: To study structure-property correlation in organochalcogen derivatives, I have very good interaction with Prof. R.J. Butcher, Howard University, Washington, D.C., Gotthelf Wolmershäuser, Universität Kaiserslautern, Kaiserslautern, Germany and Dr. R.P. Patel, Chemistry Division, BARC.
  4. Biochemistry: To study glutathione peroxidase activity of organochalcogen compounds, our group has a strong interaction with Prof. N. S. Punekar, Biotechnology   Centre, IIT, Bombay.
  5. Theoretical Chemistry: Our group is actively collaborating with Prof R. B. Sunoj of Chemistry Department.

Research papers published:

  1. T. N. Srivastava, R. C. Srivastava and H. B. Singh, Organotellurium Derivatives: Telluracyclohexane Dihalides, Pseudohalides and Carboxylates

Indian J. Chem., 18A, 71 (1979).

  1. T. N. Srivastava, R. C. Srivastava, H. B. Singh and M. Singh, Organotellurium Derivatives: Part II- Telluracyclopentane Halides, Pseudohalides and Carboxylates

Indian J. Chem., 18A, 367 (1979).

  1. T. N. Srivastava, M. Singh and H. B. Singh, `Complexes of Organotellurium Halides with N, P, O and S donors

Indian J. Chem., 21A, 307 (1982).

  1. H. B. Singh, W. R. McWhinnie, R. F. Ziolo and C. H. W. Jones, Donor-Acceptor Complexes of Organotellurium Compounds: Physical Studies 125Te Mossbauer for the measure of Charge-transfer: Crystal and Molecular Structure of Dibenzotellurophene: 7,7,8,8-Tetracyanoquinodimethane

J. Chem. Soc., Dalton Trans., 1267 (1984).

  1. H. B. Singh, W. R. McWhinnie, T. A. Hamor and R. H. Jones, Synthesis and Chemistry of 1,3-Dihydrotelluro(3,4-b)-quinoxaline and Derivatives: Crystal and Molecular of 1,3-Dihydro-2,2-diiodo-2,4-telluro(3,4-b)-quinoxaline: 2,3-Bis (iodomethyl)-quinoxaline (1:1), J. Chem. Soc. Dalton Trans., 23 (1984).
  2. H. B. Singh and W. R. McWhinnie, The Electrochemical Oxidation of 3,4-Benzo-1-telluracyclopentane

J. Organomet. Chem., 264, 305 (1984).

  1. A. E. McCarthy and H. B. Singh, The crystal and Molecular Structure of 3,4 qinoxaline-1-telluracyclopentane, C10H8N2Te

J. Organomet. Chem, 275, 57 (1984).

  1. H. B. Singh and W. R. McWhinnie, Mercurated and Tellurated Schiff Bases and Phenylhydrazones

J. Chem. Soc., Dalton Trans., 821 (1985).

  1. B. L. Khandelwal, A. K. Singh, H. B. Singh, K. M. Prasad, N. S. Bhandari and W. R. McWhinnie, Triphenyltelluronium-b-Diketonates: Synthesis and Spectra

J. Organomet. Chem., 291, 185 (1985).

  1. H. B. Singh, P. K. Khanna and S. Kalyan Kumar, Charge-Transfer Complexes : Synthesis of 3,5-Naphtho-1-telluracyclohexane, A New Electron Donor

J. Organomet. Chem., 338, 1 (1988).

  1. H. B. Singh, P. K. Khanna, Synthesis of 1,2- Ditellurane

J. Organomet. Chem., 338, 9 (1988).

  1. H. B. Singh and N. Sudha, Facile Reaction of Te-Arylbenzene- carbotellurolates, ArCOTeAr, with Methyl Iodide and Halogens

Bull. Chem. Soc., Jpn., 61, 3735 (1988).

  1. E. W. Abel, M. A. Beckett, K. G. Orrell, V. Sik and D. Stephenson, H. B. Singh and N. Sudha, Interaction of the Diphenyldichalcogens, C6H5EEC6H5(E=S,Se and Te), with the Tetrameric Halogenotrimethylplatinums. The Formation and Charactisation of [{PtX(CH3)}2C6H5EEC6H5] (X=Br and I) and a Dynammic Nuclear Magnetic Resonance Study of [{PtI(CH3)}2C6H5EEC6H5]

Polyhedron, 7, 1169 (1988).

  1. H. B. Singh and F. Wudl, Reaction of Tellurium with Phenylacetylene: A Reinvestigation, Tetrahedron Lett., 30, 441 (1989).
  2. H. B. Singh, R. H. Jacobson, K. Hinkelman and F. Wudl, Synthesis and Charactarisation of the Bis(3,4-thimethyl-2,6-dithioacetylacetonate) complexes [MS2C3H(SCH3)2 ] (M=Ni, Pd, Pt): Crystal Structure of [NiS2C3H(SCH3)2]

Inorg. Chem., 28 4221 (1989).

  1. H. B. Singh, N. Sudha, A. A. West and T. A. Hamor, Ortho-tellurated Derivatives of N,N-dimethylbenzylamine: Crystal and Molecular Structures of 2-N,N-Dimethylbenzylamine-C,N)tellurium (IV) tribromide and (2-N,N- Dimethylbenzylamine-C,N)-tellurium(Bu) dichloride.HCl

J. Chem. Soc., Dalton Trans., 907 (1990).

  1. A. Haaland, A. Hammel, H. Thomassen, H. V. Volden, H. B. Singh and P. K Khanna, The Molecular Structures of Hexamethyldistannane, (CH3)6Sn2, and Dimethylditellurane (CH3)6Te2 by Gas Electron Diffraction

Z. Naturforsch. Teil B, 45, 1143, (1990).

  1. S. Kalyan Kumar, H. B. Singh, K. Das and U. C. Sinha, Synthesis and Structure of Di-2-benzo[b]thienyl Ditelluride

J. Organomet. Chem., 397, 161 (1990).

  1. H. B. Singh and S. Kalyan Kumar, Synthesis of Novel Organoselenium-Sulphur Heterocycle: Dibenzo-1,2,5-dithiselenepin

J. Chem. Res. (S) 332 (1990).

  1. H. B. Singh and N. Sudha, Cyclotellurated Derivatives of 2-(3-Thienyl) pyridine,

J. Organomet., Chem., 397, 153 (1990).

  1. P. K. Khanna and H. B. Singh, Synthesis and Characterisation of Palladium Complexes with some Tellurium Heterocycles

Trans. Met. Chem., 16, 311 (1991).

  1. S. Kalyan Kumar, P. K. Khanna and H. B. Singh, Study of the Donor Properties of some Cyclic Tellurides and 1,8-(Thiomethylnaphthalene)-1,3-dithiole-2-thione towards 2,3-Dichloro-5,6-dicyano-1,4-benzoquinone (DDQ)

Ind. J. Chem., 30A, 720 (1991).

  1. S. Kalyan Kumar, H. B. Singh, K. Das, U. C. Sinha and A. Mishnev, Bis-(Napthalene)-1,8-diylbis(methylthio)-tetrathiafulvalene (BMMT-TTF) and bis(tetramethylenedithio)-tetrathiafulvalene (BMDT-TTF) : New Electron Donors

J. Chem. Soc., Chem. Commun., 952 (1991).

  1. S. Kalyan Kumar, H. B. Singh, J. P. Jasinski, E. S. Paight and R. J.Butcher, New p electron Donors for Organic Metals : Synthesis of Substituted tetrathiafulvalenes with eight and nine Membered Dithiaheterocycles : Crystal and Molecular Structure of 4,5-(Butylenedithio)-1,3-dithiole-2-thione

J. Chem. Soc., Perkin Trans. 1, 3341, (1991).

  1. K. Das, U. C. Sinha, S. Kalyan Kumar, H. B. Singh and A. Mikshnev, Structure of Bis(butylenedithio)tetrathiafulvalene : An Organic p-Donor Molecule

Acta. Cryst., C48, 488, (1992).

  1. H. B. Singh, N. Sudha and R. J. Butcher, Synthesis and Characterisation of Novel Chiral Orthotellurated Complexes Derived from 1-(S)-(Dimethylamino)ethylbenzene : Crystal and Molecular Structure of {2-[(S)-1-(dimethylamino)ethyl]phenyl}tellurium (IV) Trichloride Inorg. Chem., 1431 (1992).
  2. J. D. Singh, and H. B. Singh, New Symmetrical Tetrathiafulvalene Donors containing Nine, and Ten-membered Dithiaheterocycles

J. Chem. Soc., Perkin Trans. 1, 2913 (1992).

  1. K. Swaminathan, P. J. Carroll, Kochurani, H. B. Singh, and H. D. Bhargava., Structure of Trimethyltelluronium Bis(4,4-dimercapto-1,3-dithole-2-thionato) aurate(III)

Acta Crystllogr. C 49, 1243 (1993).

  1. J. D. Singh and H. B. Singh, Facile S-monodemethylation of 3,4,5-Tris(methylthio)-1,2-dithiolium iodide Synthesis of a Highly Functionalised Tetrathiacuyclodecane

J. Chem. Res., 224, (1993).

  1. J. D. Singh and H. B. Singh, Synthesis and Properties of [M(dmit)2]2- and [M(dmt)2]2- Complexes (M = Se, or Te; dmit = 4,5-dimercapto-1,3-dithiole-2-thione, and dmt = 4,5-dimetrcapto 1,2-dithiole-3-thione)

Polyhedron, 12, 2849 (1993).

  1. H. B. Singh A. Regini V., J. P. Jasinski, E. S. Paight and R. J. Butcher, Synthesis and Characterisation of the Complexes of the Trimethylplatinum (IV) iodide with Ditelluride and Ditellurethers : The crystal and Molecular Structure of (PtMe3I)2(4-MeOC6H4Te)2]

J. Organomet. Chem., 415, 283 (1994).

  1. H. B. Singh, A. Regini V., J. P. Jasinski, E. S. Paight and R. J. Butcher, Synthesis and Characterisation of some Ferrocene containing Telluroether Ligands : Crystal and Molecular Structure of 1.1 Bis(phenyltelluro)ferrocene

J.Organomet. Chem., 464, 87 (1994).

  1. K. Swaminathan, P. J. Carroll, J. D. Singh and H. B. Singh, Structure of Bis(methylethylenedithio)tetrathiafulvalen

Acta Crystallogr., C 50, 1958, (1994).

  1. H. B. Singh and N. Sudha, Intramolecular Coordination in Tellurium Chemistry

Coord. Chem. Rev., l35-l36, 469 (1994).

  1. J. D. Singh, H. B. Singh, K. Das and U. C. Sinha, Facile S-Monodemethylation of 3,4,5-Tris(methylsulfanyl)-1,2-dithiolium Iodide : Crystal and Molecular Structure of the obtained 4,5-Bis(methylsulfanyl)-1,2-dithiole-3 thione

J. Chem. Research (S), 312-313, (1995), J. Chem. Research (M), 1913-1926 (1995).

  1. C. Trindle and H. B. Singh, Notes on the Modelling of 3,3,4,4 Tetrakis(alkylthio)-2,2,5,5-tetrathiofulvalenes by Molecular Mechanics and Parametrized MO Calculation

J. Org. Chem., 60, 5708 (1995).

  1. A. Regini V., R. Kaur, N. Sudha, S. C. Menon and H. B. Singh, Ortho-tellurated Derivatives of some Arylamines and Imines

Proc. Indian Acad. Sci. (Chem.Sci.). 107,431 (1995).

  1. R. Kaur, H. B. Singh, and R. J. Butcher, Synthesis and Characterisation of some Hybrid Bi- and Multidentate Tellurium Ligands Derived from N,N Dimethylbenzylamine : Coordination Behaviour of Bis[2 dimethylaminomethyl-phenyl]Telluride with Chromium Carbonyl

Organometallics, 14, 4755 (1995).

  1. H. B. Singh and N. Sudha, Organotellurium Precursors for Metal Organic Chemical Vapour Deposition (MOCVD) of Mercury Cadmium Telluride (MCT), (Review) Polyhedron, 15, 745 (1996).
  2. R. Kaur, H. B. Singh, R. P. Patel and S. K. Kulshreshtha, Synthesis of Monomeric Selenolato complexes of Mercury with Nitrogen containing chelating ligand : Molecular structures of Hg(1-Me2NCH2C6H4-2-Se)2 and Chiral Hg[CS,R)(C5H5)Fe(C5H3-1-CH(Me)NMe2-2-Se)]2

J. Chem. Soc. Dalton Trans., 461,(1996).

  1. S. C. Menon, H. B. Singh, R. P. Patel and S. K. Kulshreshtha Synthesis and Structure of the First Tellurium Containing Macrocyclic Ligand

J. Chem. Soc. Dalton., Trans., 1203,(1996).

  1. S. C. Menon, H. B. Singh, J. M. Jasinski, J. P. Jasinski and R. J. Butcher, Intramolecularly Coordinated Low-Valent Organotellurium Complexes Derived from 1 Dimethylaminonaphthalene

Organometallics, 15, 1707, (1996).

  1. R. Kaur, H. B. Singh, and R. P. Patel Synthesis Characterisation and Reactions of a Tetradentate Diaminodiselenide Ligand, Structure of Bis[2-(Dimethylaminomethyl)phenyl] Diselenide and [2-(Dimethylaminomethyl) phenyl]selenium (II) Bromide

J. Chem. Soc. Dalton Trans, 2718, (1996).

  1. R. Kaur, S. C. Menon and H. B. Singh, New aspects of Intramolecular Coordination in Organochalcogen (Se/Te) Chemistry

Proc. Indian Acad. Sci., 108, 159, (1996).

  1. S. C. Menon, H. B. Singh, R. P. Patel, K. Das and R. J. Butcher, Chiral Tellurium Azomethines : Polymorphism of [o-(IR,2S)-[2-Hydroxy-2-phenyl-1-methyl-ethyl)iminomethinyl)phenyltellurium (IV) Bromide

Organometallics, 18, 563, (1997).

  1. J. D. Singh, E. V. K. Suresh Kumar, H. B. Singh, K. Das, and U. C. Sinha, New p Electron Donors : Synthesis and Properties of Functioanlised Bis(ethylendithio)tetrathiafulvalene (BEDT-TTF) Derivatives

Tetrahedron, 53, 11627, (1997).

  1. Kochurani, H. B. Singh, J. P. Jasinski, E. S. Paight and R. J. Butcher, Synthesis and Characterisation of some [E(C3S5)2]4- Complexes (M = Ni, Pd, Pt). Single Crystal Structure of [PPN][Ni(C3S5)2].MeOH

Polyhedron, 16, 3505, (1997).

  1. G.Mugesh, H.B.Singh, R.P. Patel and R.J. Butcher, Synthesis and       Characterization of Monomeric Zinc, Cadmium and Mercury Selenolates

Inorg.Chem. 37, 2663, (1998).

  1. E. V. K. Suresh Kumar, J. D. Singh, H. B. Singh, K. Das, J. V. Yakhmi and R. J. Butcher, Dithiaheterocycle-annelated tetrathiafulvalene p-donors: a structure-property correlation study

J. Chem. Soc., Perkin Trans 1, 1769, (1998).

  1. G. Mugesh, A. Panda, H. B. Singh, N. S. Punekar and R. J. Butcher, Diferrocenyl Diselenides: Excellent Thiol Peroxidase-like Antioxidants

Chem. Commun., 2227, (1998).

  1. E. V. K. Suresh Kumar, S. A. Chavan, A. K. Sra, M. K. Bhide, M. D. Sastry, R. Ganguly, H. B. Singh and J. V. Yakhmi, Ferromagnetism at 19K in a Bimetallic Compound Based on 1,2-Propanediamine Ligand

Philosopical Magazine. B, 79, 127, (1999).

  1. G. Mugesh and H. B. Singh, Synthesis and Characterization of Monomeric Tellurolato Complexes of Zinc and Cadmium: Crystal and Molecular Structure of Bis[2-(4,4-dimethyl-2-oxazolinyl) phenyl]ditelluride.

J. Organomet. Chem., 577, 243, (1999).

  1. G. Mugesh, A. Panda, H. B. Singh and R. J. Butcher, Intramolecular Se...N Nonbonding Interaction in Low-Valent Organoselenium Derivatives: A Detailed Study by 1H, 77Se NMR Spectroscopy and X-ray Crystallography

Chem. Eur. J., 5, 1411 (1999).

  1. G. Mugesh, H. B. Singh and R. J. Butcher, Novel Chiral Organoselenenyl Halides Stabilised by Se...N Nonbonded Interactions: Synthesis and Structural Characterization Tetrahedron: Asymmetry, 10, 237 (1999).
  2. A. Panda, G. Mugesh, H. B. Singh and R. J. Butcher, Structure and Reactivity of Organochalcogen (Se, Te) Compounds Derived from 1-(Dimethylamino) naphthalene and N,N-Dimethylbenzylamine

Organometallics, 18, 1986, (1999).

  1. G. Mugesh, H. B. Singh and R. J. Butcher, The First Example of a Structurally Characterized Monomeric Bismuth Selenolate

J. Chem. Res. (S), 416-417 (1999); J. Chem. Res. (M), 1801-1810 (1999).

  1. G. Mugesh, H. B. Singh and R. J. Butcher, Synthesis and Structural Characterization of Monomeric Zinc(II), Cadmium(II) and Mercury(II) Arenethiolates with a Chelating Oxazoline Ligand

Eur. J. Inorg. Chem., 1229, (1999).

  1. G. Mugesh, H. B. Singh and R. J. Butcher, Intramolecular S...N Nonbonded Interactions in Organosulfur Derivatives: Crystal and Molecular Structures of [2-(4,4-dimethyl-2-oxazolinyl)phenyl]benzyl sulfide and bis[2-(4,4-dimethyl-2-oxazolinyl)phenyl] sulfide

J. Chem. Res. (S), 472-473 (1999); J. Chem. Res. (M), 2020-2051 (1999).

  1. S. C. Menon, A. Panda, H. B. Singh and R. J. Butcher, "Synthesis and Single Crystal X-ray Structure of the First Cationic Pd(II) Complex of a Tellurium-containing Polyaza Macrocycle: Contrasting Reactions of Pd(II) and Pt(II) with the 22-Membered Macrocyclic Schiff Base"

Chem. Commun., 143, 2000.

  1. G. Mugesh, H. B. Singh, "Synthetic Organoselenium Compounds as Antioxidants: Glutathione Peroxidase Activity"

Chem. Soc. Rev., 29, 347, (2000)

  1. S. D. Apte, H. B. Singh and Ray Butcher, "Synthesis and Characterisation of New Bis[2-(4,4-dimethyl-2-oxazoline)phenyl] Chalcogenides: Crystal and Molecular Structure of Bis[2-(4,4-dimethyl-2-oxazoline)phenyl] Telluride"

J. Chem. Res. (S), 160-161 (2000); J. Chem. Res. (M), 0559-0569 (2000).

  1. G. Mugesh, A. Panda and H. B. Singh, "Aspects of Organochalcogen (S, Se, Te) Compounds Stabilised by Intramolecular Coordination"

Proc. Indian Acad. Sci., 112, 239-248, (2000) .

  1. G. Mugesh and H. B. Singh, "Biological Activities of Synthetic Organoselenium Compounds: Recent Developments"

Proc. Natl. Acad. Sci., 70, part III 207-220 (2000).

64.  G. Mugesh, A. Panda, H. B. Singh, N. S. Punekar, R. J. Butcher, "Glutathione Peroxidase-like Antioxidant Activity of Diaryl Diselenides: A Mechanistic Study"

J. Am. Chem. Soc., 123, 839-850, (2001).

65.  G. Mugesh, H. B. Singh and R. J. Butcher, Chemistry of 2-(2-Hydroxyphenyl)-2-oxazoline: Some First Row Transition Metal Complexes of This Naturally Occurring Binding Group

Eur. J. Inorg. Chem., 669-678, (2001)

66.  A. Panda, S. C. Menon, H. B. Singh, and R. J. Butcher, "Synthesis of Some Macrocycles/bicycles from Bis(o-formylphenyl) selenide: X-ray Crystal Structure of Bis(o-formylphenyl) selenide and the First 28-Membered Selenium Containing Macrocyclic Ligand."

J. Organomet. Chem., 623, 87-94 (2001)

67.  A. Panda, G. Mugesh, H. B. Singh and R. J. Butcher, "Intramolecularly Coordinated Organoselenium Derivatives: Synthesis, Structure and Reactivity"

Phosphorus, Sulfur & Silicon & Related Elements. 171, 187-205 (2001).

68.  G. Mugesh and H.B.Singh Heteroatom-directed Aromatic Lithiation: A Versatile Route to the Synthesis of Organochalcogen (Se, Te) Compounds

Acc. Chem. Res., 35, 226 236, (2002).

69.  G.Mugesh, A.Panda, S.Kumar S. Apte, H.B.Singh and R.J.Butcher Intramolecularly Coordinated Diorganyl Ditellurides: Thiol Peroxidase-like Antioxidants

Organometallics,  21, 884 892,  (2002).

70.  Kochurani, K. Kandasamy, H. B. Singh and B. Varghese, "Synthesis, characterization and structural studies of metal complexes based on dmit, dmt and tbs ligands. Crystal structure of [PPN][Au(dm it)2].CH3CN"

Indian. J. Chem. 42A, 2344-2351 (2003) (Special issue: invited article for the Diamond Jubilee Year)

71.  K. Kandasamy, S. Kumar, H. B. Singh and G. Wolmershäuser, "Influence of both steric Effects and Te¼N intramolecular nonbonded interactions on the stabilization of organotellurium compounds inco rporating [2-[1-(3,5-dimethylphenyl)-2-naphthyl]-4,5-dihydro-4,4-dimethyloxazole]"

Organometallics 22, 5069-5078 (2003).

  1. S. D. Apte, S. S. Zade, H. B. Singh and R. J. Butcher, "Contrasting Behavior of Bis[(2-(4,4-dimethyl-2-oxazolinyl)phenyl] Chalcogenides (Se/Te) toward Mercuric Chloride: Facile C leavage of Te-C Bond"

Organometallics 22, 5473-5477 (2003).

  1. K. Kandasamy, S. Kumar, H. B. Singh, R. J. Butcher and K. T. Holman, "Synthesis, structural characterization and fluorescence properties of organoselenium compounds bearing a ligand contain ing both steric and nonbonded interacting groups. First unusual observation of both Se¼N and Se¼O intramolecular interactions in a diselenide structure" Eur. J. Inorg. Chem.1014-1023 (2004).
  2. S. Panda, H. B. Singh and R. J. Butcher, "Contrasting coordination behaviour of 22-membered chalcogenaaza (Se, Te) macrocylces towards Pd(II) and Pt(II): Isolation and structural cha racterization of the first metallamacrocyle with a C-Pt-Se linkage"

Chem. Commun., 322-323 (2004).

  1. S. C. Menon, A. Panda, H. B. Singh, R. P. Patel, S. K. Kulshrestha, W. L. Darby and R. J. Butcher, "Tellurium Azamacrocycles: Synthesis, Characterisation and Coordination Studies"

J. Organomet. Chem. 689, 1452-1463 (2004).

  1. S. Kumar, K. Kandasamy, H. B. Singh, and R. J. Butcher, "Synthesis of organochalcogens stabilized by intramolecular nonbonded interaction of sterically non-hindered 2-phenyl-2-oxazoline"

New. J. Chem., 28, 640-645 (2004)

  1. S. Kumar, K. Kandasamy, H. B. Singh and R. J. Butcher, Ring Size Effect on Reactivity of (2-phenyl-5,6-dihydro-4H-1,3-oxazinyl)lithium (C-Li) Bond and SeN Interactions in Low-valent Organoselenium Compounds: Facile Isolation of Diorganotriselenide Organometallics 23, 4199 (2004)
  2. K. Kandasamy, H. B. Singh, R. J. Butcher, and J. P. Jasinski, Synthesis, Structure, and Catalytic Properties of VIV, MnIII, MoVI and UVI Complexes Containing Bidentate (N, O) Oxazine and Oxazoline Ligands

Inorg. Chem. 43, 5704 (2004)

  1. S. S. Zade, H. B. Singh, R. J. Butcher, The Isolation and Crystal Structure of a Novel Cyclic Selenenate Ester Derived from Bis(2,6-diformyl-4-t-butylphenyl)diselenide and Its Excellent Glutathione Peroxidase Like Activity

Angew. Chem. Int. Ed. Engl. 43, 4513 (2004)

  1. Sanjio S. Zade, Snigdha Panda, Santosh K. Tripathi, Harkesh B. Singh and Gotthelf Wolmershäuser,Convenient synthesis, characterization and GPx-like catalytic activity of novel ebselen derivatives

Eur. J. Org. Chem. 3857 (2004)

  1. Sangit Kumar, Santosh K. Tripathi, Harkesh. B. Singh and Gotthelf Wolmershäuse, Synthesis, reactivity, electrochemical and crystal structure studies of ferrocenoyl diselenide and selenides

J. Organomet. Chem. 689, 3046 (2004)

  1. V. K. Jain and H. B. Singh, The Chemistry of Selenium and Tellurium

Platinum Metals Rev. 48, 116 (2004)

  1. S. Panda, H. B. Singh and R. J. Butcher, Synthesis and Structure of Mercurous Ion and Dinuclear Lead(II) Complexes of the 28-Membered Selenaaza Macrocycle: Dominance of the Chelate Ring Size Effect Over Soft-Soft Interactions

 Inorg. Chem. 43, 8532-8537 (2004).

  1. K. Kandasamy, H. B. Singh, G. Wolmershäuser, Mercury chalcogenolates of a ligand having both sterically more bulkier and intramolecularly coordinating features: First isolation of a novel air stable mercury tellurolate

Inorg. Chim. Acta  358, 217-222 (2005)

  1. Sanjio S. Zade,a Snigdha Panda,a Harkesh B. Singh,a* Gotthelf Wolmershäuserb, SeCl2: A convenient source of electrophilic Se2+ reagent

Tetrahedran Lett., 46, 665-669 (2005)

  1. Upali Patel, Harkesh B. Singh and Gottelf Wolmershauser, Synthesis of a novel metallophilic metallamacrcycle: A HgII···CuI···HgII···HgII···CuI···HgII interaction Angew. Chem. Int. Ed. Engl , 44, 1715-1717 (2005)
  2. A. Panda, S. C. Menon, H. B. Singh, C. P. Morley, R. Bachman, T. M. Cocker and R. J. Butcher, Synthesis, characterization and coordination chemistry of some selenium- containing macrocyclic Schiff bases

Eur. J. Inorg. Chem. , 1114-1126 (2005)

  1. Sanjio S. Zade, Snigdha Panda, Harkesh B. Singh, Raghavan B. Sunoj, Ray J. Butcher, Intramolecular Interactions between Chalcogen Atoms: Organoseleniums derived from 1-Bromo-4-tert-butyl-2,6-di(formyl)benzene

J. Org. Chem., 70, 3693-3704 (2005).

  1. Sangit Kumar, Harkesh B. Singh a, Gotthelf Wolmershäuser, Synthesis and characterization of [2-(2-phenyl-5,6-dihydro-4H-1,3-oxazinyl)] tellurenyl chloride

J. Organomet. Chem., 690, 3149-3153 (2005).

  1. Snigdha Panda, Sanjio S. Zade, Harkesh B. Singh and Gotthelf wolmershauser,Synthesis and Characterisation of a Novel Chiral Azomethine Diselenide

J. Organomet. Chem., 690, 3143-3148 (2005).

  1. Snigdha Panda, Sanjio S. Zade, Arunashree Panda, Harkesh B. Singh, Ray J. Butcher, Anion binding with some 22- and 28-membered selenaaza macrocycles: Structural aspects and 77NMR studies

 J. Organomet. Chem. ( in press)

  1. Snigdha Pandaa, Sanjio S. Zadea, Harkesh B. Singha* and Ray J. Butcherb, The ligation properties of some reduced Schiff base selena/telluraaza macrocycles: versatile structural trends, 

Eur. J. Inorg. Chem. (2006)

  1. Sangit Kumar, Snigdha Panda, Harkesh B. Singh, Gottelf Wolmershauser and Ray J Butcher, Structural Aspects of Some Organoselenium Compounds

J. Structural Chemistry, (2006)

  1. Sangit Kumar, Harkesh B, Singh and Gotthelf Wolmershauser, Protection against peroxynitrite-mediated nitration reaction bt intramolecularly coordinated diorganoselenides,

     Organometallics (2006)

  1. Sangit Kumar and Harkesh B. Singh, Thiol Peroxidase-Like Activity of Some Intramolucularly Coordinated Diorganyl Diselenides

J. Chemical Sciences (2006).

  1. Sangit Kumar, Snigdha Panda, Harkesh B. Singh, Gottelf Wolmershauser and Ray J Butcher, " Structural Aspects of Some Organoselenium Compounds"

J. Structural Chemistry, ( invited article, in press)

  1. Upali Patel, Harkesh B. Singh, and Ray J. Butcher, "Synthesis and characterization of some 22-membered chalcogenaza macrocycle and the first Co(II) complexe of selenaza macrocycle"

Eur. J. Inorg. Chem., 5089-5097 (2006).

  1. Sagar Sharma, K. Selvakumar, Vijay Pal Singh, Sanjio S. Zade Harkesh B. Singh,"Aspects of Intramolecularly Coordinated Organochalcogen Derivatives" Phosphorus, Sulfur, and Silicon and Related Elements, (Proceedings of ICCST-10 2007)

  1. Tapash Chakraborty, Snigdha Panda, Harkesh B. Singh Ray Butcher, Synthesis and characterisation of some mercury complexes of selenaazamacrocycles¿, Phosphorus, Sulfur, and Silicon and Related Elements, (Invited article 2007).

  1. Upali Patel, Harkesh B. Singh, Ray J. Butcher and Gotthelf Wolmershauser, "Synthesis and charecterization of the metallophilic mercuraza macrocycle and complexation with closed shell metal ion"

J. Am. Chem. Soc., (to be submitted)

  1. Anna J. Mukherjee, Sanjio S. Zade, Harkesh B. Singh and Raghavan B. Sunoj, ¿Organoselenium chemistry: role of intramolecular interactions

Chem. Rev, ((to be submitted)

  1. Rupinder Kaur, Saija C. Menon, Snigdha Panda, Harkesh B. Singh, Rajan P. Patel and Ray J. Butcher, ¿Organochalcogen hybrid (NEEN, NEN, EN where E= Se or Te) ligands: facile cleavage of C-E and E-E bonds¿

Organometallics, (to be submitted)

Conference Papers

  1. G. Mugesh, A.Panda, S. D. Apte and H. B. Singh., Glutathione Peroxidase Activity of Diorganyl Ditellurides. The 5th International Electronic Conference on Synthetic Organic Chemistry(ECSOC-5), September 1-30, 2001. http://www.mdpi.net/ecsoc-5/
  2. E. V. K. Suresh Kumarm S. A. Chawan, H. B. Singh and J. V. Yakhmi, A New Bimetallic Ferromagnet Based on 1,2-propanediamine Ligand Proceedings of the DAE Solid State Phys. Symp. (India) Vol. 39C, pp 89 (1996).
  3. More recently we have prepared a new Organic Metal, (BMeEDT-TTF)8/3CuCl2 which exhibits metallic behaviour below 130 K. The results are presented at proceedings of the DAE Solid State Symposium held at Indian Association for Cultivation of Sciences, Javapur, Culcutta, December 27-31, (1995).

E.V.K. Suresh Kumar, H.B. Singh, S.A. Chavan, and J.V. Yakhmi, Charge Transfer Behaviour of Bis(methylethylenedithio)tetrathiafulvalene (BMeEDT-TTF) Complexes,  Proceedings of DAE Solid State Phys. Symp.(India)  Vol. 38C .pp. 273. (1995)

  1. We in collaboration with Dr. J.V. Yakhmi, have prepared and characterised a known Organic Superconductor, k-(BEDT-TTF)2Cu(NCS)2 with a Tc of 7.76 K. The results were presented at Proceeedings of the DAE Solid State Physics Symposium held at University of Rajasthan, Jaipur, December 27-31, (1994).

E.V.K. Suresh Kumar, H.B. Singh, S.A. Chavan, I.K. Gopalkrishna and J.V. Yakhmi, Sonochemical Synthesis of k-(BEDT-TTF)2Cu(NCS)2 its superconducting properties, Proceedings of DAE Solid State Phys. Symp. (India) Vol. 37 C pp. 312 (1994).

  1. One of our papers in the area of Organic Metals, published in the Journal of Chemical Society, Chemical Communications, 952, 1991, was cited in Applied Highlights section of Chemistry & Industry pp. 804, (1992).
  2. Kochurani, H.D. Bhargava and H.B. Singh, Synthesis and characterization of New conductors based on M(DMIT)2 Anion (H2DMIT = 4,5-Dimercapto-1,3- dithiole-2-thione, M = Ni, Cu, Pd, Pt),

            Synthetic Metals, 41-43, 2299 (1991).

 

National and International conferences

     

  1. 9th CRSI National Symposium in Chemistry, Department of Chemistry, university of Delhi, Feb, 1-4, 2007 (Council Member)
  1. H. B. Singh, "Glutathione Peroxidase-like activity of Organochalcogen Coumpounds" Professor R. C. Paul 3rd Annual Sypmosium on Recent Trends in chemistry, March 1-2, 2007.
  1. H. B. Singh, Aspects of Intramolecularly Coordinated Organochalcogen derivatives¿ Recent Trends in Inorganic and Analytical Chemistry, Department of Chemistry, University of Pune, Sep 1-2, 2006..
  1. 76th Annual Session of The National Academy of Sciences, India, Oct. 6-8, 2006. ( member organizing committee).
  1. DAE-BRNS International symposium on Materials, Chemistry division, BARC, Mumbai, Dec 6-8, 2006. ( Member organizing committee)..
  1. H. B. Singh, ¿Aspects of Intramolecularly Coordinated Organochalcogen derivatives¿, First Prof. T. N. Srivastava Memorial Lecture atSilver jubilee conference , Indian Council of Chemists, Birla College Kalyan, Dec 2-29, 2006.
  1. H. B. Singh, Aspects of Intramolecularly Coordinated Organochalcogen derivatives¿ In-House Symposium, Department of Chemistry, IIT Bombay August 19th 2006.
  1. Upali Patel, H. B. Singh, Ray J. Butcher and Gotthelf Wolmershauser, Metallophilic mercuraza macrocycles¿ P-185 at 8th CRSI National Symposium in Chemistry, IIT Bombay Feb 3-5, 2006
  1. H. B. Singh, Upali Patel and Ray J. Butcher, The first Encapsulation of Ag(I) Ion by a Metallamacrocycle P-201 at MTIC, IIT New Delhi Dec 8-10, 2005.
  1. H. B. Singh, Aspects of Selenium Biochemistry DST sponsored workshop on Bioinorganic Chemistry, Inorganic and Physical Chemistry Department, Indian institute of Science, Bangalore, October 20-21, 2005.
  1. H. B. Singh, Aspects of Intramolecularly coordinated Organochalcogens, Department of Chemistry, Punjab University, Chandigarh, Sep 29th, 2005.
  1. H. B. Singh, Aspects of Intramolecularly coordinated Organochalcogens, Department of Chemistry, University of Madras, Sep 22nd, 2005.
  1. H. B. Singh, Aspects of Intramolecularly coordinated Organochalcogens, Department of Chemistry, Sri Sathya Sai Institute of Higher Learning, Puttaparthy, Sep 25th 2005.
  1. H. B. Singh, Stability of complexes and 18-electron rule Worhshop on Spectroscopy & Select Topics in Chemistry, Vaze College of Arts, Science and Commerce, Mulund, Mumbai, Sep 23rd, 2005.
  1. H. B. Singh, Intramolecularly Coordinated Organoselenium derivatives; Recent Developments DST sponsored Workshop on Organometallic Chemistry, Chemistry      Division, BARC, April 20th, 2005 
  1. H. B. Singh, Aspects of Intramolecularly Coordinated Organselenium Compounds Department of Chemistry, Goa University, March 4th, 2005.

  2. H. B. Singh, Aspects of Intramolecularly Coordinated Organochalcogens Indian Institute of Science, Bangalore, 21st August, 2003.

  3. H. B. Singh, Organometallic Chemistry: Synthesis, structure and applications of organochalcogens (S, Se and Te), Bronze Medal Lecture, Fifth CRSI National Symposium, CLRI, Chennai, 8th February, 2003.

  4. H. B. Singh, Aspects of Intramolecularly Coordinated Organochalcogens IIT Kanpur, 22nd August, 2002.

  5. H. B. Singh, Aspects of Intramolecularly Coordinated Organochalcogens GND University, Amritsar, 30th August, 2002.

  6. H. B. Singh, Aspects of Intramolecularly Coordinated Organochalcogens Bharthidasan University, Thiruchirapalli, 26th November, 2002.

  7. H. B. Singh, Aspects of Intramolecularly Coordinated Organochalcogens  Lucknow University, 18th December, 2002.

  8. H. B. Singh, Intramolecularly Coordinated Organochalcogen as Glutathione Peroxidase Mimics invited seminar, Chemistry Department, IIT Guwahati, 7th May, 2002,.

  9.  H. B. Singh, Intramolecularly Coordinated Organochalcogen as Glutathione Peroxidase Mimics an invited seminar, Chemistry Department, M. S. University, Baroda, 3rd November, 2001,.

  10. S. D. Apte, Sanjio. S. Zade, H. B. Singh and R. J. Butcher, Contrasting behaviuor of bis[2-(4,4-dimethyl-2-oxazolinyl)phenyl]chalcogenides(Se/Te) towards mercuric chloride An invited poster presentation, MTIC-(IX), Dec 12-14, 2001, IACS, Calcutta.

  11. H. B. Singh, Role of intramolecularly coordination in Glutathione Peroxidase-like activity of Organochalcogens An invited lecture at Indian Council of Chemists, 2001, Mysore Dec 22-24, 2001.

  12. A plenary lecture on Organochalcogen Chemistry at the 8th International Conference on the Chemistry of Selenium and Tellurium (8ICCST) Brazil, Aug., 6-11, 2000.

  13. Invited session lecture at symposium on Modern Trends in Inorganic Chemistry IISc, Bangalore, Jan. 18th-20th, 2000.

  14. Invited lecture at "Synthesis, structure and Reactivity of Intramolecularly coordinated organochalcogen Derivatives." Chemistry Depatment, "Sri Sathya Sai Institute of Higher Learning" (SSSIHL), Jan. 21-23, 2000.

  15.  H. B. Singh, "Intramolecularly coordinated organoselenium derivatives: synthesis, structure and reactivity" Lucknow University, 3rd Dec. 1998.

31.  H. B. Singh, "Intramolecularly coordinated organoselenium derivatives: synthesis, structure and reactivity" Professor C. Natarajan Endowment Lecture in Inorganic Chemistry at Madhurai Kamaraj University, 7th Oct. 1998.

32.  G. Mugesh, A. Panda, N. S. Punekar, H. B. Singh, R. J. Butcher, "Glutathione Peroxidase Activity of Some Diaryl Diselenides " Poster presentation at the Symposium on Frontiers in Inorganic Chemistry at IISc Bangalore, 8-10 July 1998.

33.  H. B. Singh, "Intramolecularly coordinated organoselenium derivatives: Synthesis, structure and reactivity" IIT Kanpur, 15th Apr. 1998.

34.  H. B. Singh, "Intramolecularly coordinated organoselenium derivatives: synthesis, structure and reactivity" IIT Madras, 28th Feb. 1998.

35.  G. Mugesh, H. B. Singh, Intramolecularly Stabilized Organoselenenyl Halides. Poster presentation at the Symposium on Modern Trends in Inorganic Chemistry at Indian Institute of Technology, Kanpur, during December 3-6, 1997.

36.  H. B. Singh, "The role of intramolecular coordination in the preparation of novel organochalcogen ligands/reagents" University of Wales, Swansea, UK, 28th Nov. 1997.

37.  H. B. Singh, "The role of intramolecular coordination in the preparation of novel organochalcogen ligands/reagents" Aston University, Birmingham, UK, 24th Nov. 1997.

38.  H. B. Singh, "Synthesis and characterisation of dithiaheterocycle-annelated tetrathiafulvalene derivatives: A structure-property correlation study" Aston University, Birmingham, UK, 26th Nov. 1997.

39.  H. B. Singh, "Role of intramolecular coordination in the preparation of glutathione peroxidase mimics and group II-VI MOCVD precursors" Aston University, Birmingham, UK, 28th Nov. 1997.

40.  H. B. Singh, Synthesis and Structural Characterisation of Some Novel Intramolecularly Coordinated Organoselenium and Organotallurium Compounds, (Invited Lecture) at Modern Trends in Inorganic Chemistry held at University of Hydrabad, August 17-19, 1995.

41.  H. B. Singh, New Organotellurium Ligands and Related Derivatives (Invited Lecture) at the International symposium on Metallo-organic Chemistry, held at University of Rajasthan, Jaipur, January 1-4, 1994.

42.  H. B. Singh, Science in India and International Cooperation (brief talk) at Young Scientists Session, 81st Indian Science Congress, University of Rajasthan, Jaipur, January 5th, 1994.

43.  H. B. Singh, New p-Electron Donors and their charge-transfer complexes, (Invited Lecture) at symposium on Recent Trends in Chemistry, held at Punjab University, Chandigarh, February 21-22, 1994.

44.  H. B. Singh, Synthesis and Characterization of New p-Electron Donors and Acceptors (Invited Lecture) at Fourth NOST symposium, held at I.I.P. Dehradun, March 13-17, 1994.

45.  H. B. Singh, New Organotellurium Ligands and Related Derivatives (Invited Lecture) at Winter School-cum-Workshop on Organometallic Chemistry, held at I.I.T. Delhi (December 1993).

46.  H. B. Singh, Syntheisis of Some Novel Organotelluriums (Invited lecture) at The discussion meeting on Organic Synthesis and Catalysis via Metallo-organics held at NCL, Pune, September 23-24, 1993.

 

Books/Monographs/Lectures Notes/Curriculum Development Materials:

 

1.     Contributed a research article for the Proceedings of Workshop on OrganometallicChemistry (DST  sponsored) held at BARC 18-20 April 2005.

2.    Chiarman for the IXth International Conference on the Chemistry of Selenium and Tellurium held at Department of Chemistry, IIT Bombay from 23-27, February, 2004. Guest Editor for the Proceedings of IXth International Conference on the Chemistry of Selenium and Tellurium to be published in Phosphorous, Sulfur, Silicon and related Elements.

  1. Convener for a DST Group Monitoring Workshop held at Department of Chemistry, IIT Bombay, March, 2002.
  2. Coordinator for a DST Sponsored Winter School on Main Group Chemistry held at Department of Chemistry, IIT Bombay, from 18-30 March, 2002. Compiled Edited and contributed a chapter for the lecture notes on Main Group Chemistry given by the Resource Persons.
  3. CH 831 Advanced Laboratory Techniques: Professor. D. K. Chakravarthy, S. S. Talwar and I have written notes for experiments on IR, NMR, Atomic Absorption Spectroscopy and Flame Photometry for the above course.
  4. Laboratory Safety: I have also compiled a brief laboratory safety manual.
  5. I am contributing to a monograph on Organotellurium Chemistry along with Prof. W. R. McWhinnie (Birmingham, UK) and Prof. V. I. Minkin (USSR) for Gordon Breach, New York, 2001.

 

Technical/Research Reports

            I have written 10 technical/research reports.

Editorial or Review Work for Learned Journals and Proceedings of Conferences, Symposium

  1. I regularly review several research papers submitted to the Indian Journal of Chemistry (A) published by CSIR, Journal of Indian Chemical Society, Journal of American Chemical Society, Organometallics, Inorganic Chemistry, Chemical Reviews (American Chemical Society), Journal of Organometallic Chemistry, European Journal of Inorganic Chemistry, European Journal of Organic Chemistry, Inorganic Chemistry Communications Tetrahedron.
  2. In addition I have refereed several research proposal submitted to DST and CSIR, BRNS and DRDO.
  3. I have evaluated Ph. D. Thesis of several Universities and Institutions.

 

Participation in administration, student welfare, social service and other activities.

1.                  I was Associate Warden of Hostel-5 from April 1993-95.

 

INVOLVEMENT IN CONTINUOUS EDUCATION PROGRAMME:

I have given several lectures on Organometallic Chemistry to college teachers at Refresher courses held at

1.                  University of Bombay

2.                  University of Madras

3.                  NEHU, Shillong

4.                  University of Poona

5.                  GND University, Amritsar

6.                  Bharathidasan University, Thiruchirapalli.

 

RESEARCH OBJECTIVES/ACHIEVEMENTS

            My long term research objectives are centered around design, synthesis and structural studies of novel organometallic derivatives of sulphur, -selenium and -tellurium and their applications.

1) The work on organosulfur compounds deals with molecular metals and superconductors.

The realization of superconductivity in the family of ion-radical salts derived from p-donors, tetramethyltetraselenafulvalene (TMTSF) and bis(ethylenedithio)tetrathia-fulvalene (BEDT-TTF), has generated wide-spread interest in design and synthesis of organochalcogen p-donors. To understand structure-property relationship in these class of donors, we have undertaken a long term research programme on the design, synthesis and characterisation of potential molecular conductors and superconductors based on novel organochalcogen p-donors and p-acceptors.

            Initially, our work focussed on the study of charge-transfer in organotellurium donors. We have unambiguously established that the donors in which the hetero-atom is not directly linked with the p-system, usually behave as n-donors towards p-acceptors.

            To establish structure-property relationship in the BEDT-TTF family of conductors, we have prepared a range p-donors incorporating the C6S8 core but varying the size of the exocyclic ring. The C6S8 core in bis(butylenedithio)tetrathiafulvalene with eight-membered exocyclic ring, is almost planar. Bis(methylethylenedithio)-tetrathiafulvalene has almost identical structure to that of BEDT-TTF and has given one new organic metal.

            More recently, we have succeeded in preparing first example of hydroxy functionalised BEDT-TTF derivatives. These will be used as precursors for the synthesis of oligomeric TTFs. Recently, we are pursuing our studies towards the synthesis of novel amino functionalised TTFs. Single crystal X-ray diffraction studies of 4 TTFs has led to better correlation in structure and conductivity in this class of compounds. The observations have been further corraborated by theoretical calculations.

2) The work on organoselenium and tellurium compounds deals with the synthesis of Novel Organochalcogens Stabilized by Intramolecular EX (E = Se. Te ; X = N, O) Interactions and their applications in the following areas:

a) Ligand chemistry and catalysis:

            The ligand chemistry of tellurium has attracted considerable current interest. Our major research efforts are directed in this direction. Initially, we studied coordination abilities of known ligands such as cyclic tellurides and ditellurides. Recently, we have made significant contribution in the area of hybrid multidentate, achiral and chiral ligands containing both soft tellurium and hard nitrogen. First examples of tellurium containing macrocyclic Schiffs base have also been prepared and characterised. More recently, we have reported the first examples of metallophilic metallamacrocyles, which encapsulate d10 metal ions. Examples of chiral group 12 selenolates, where chirality is due to helicity, have also been isolated and charaterised. The ligating properties and the fluorescence behaviour of the metallamacrocycles are being currently explored.

b). New Chiral and Achiral Reagents for Organic Synthesis:

            Organoselenium and organotellurium compounds are becoming increasingly important as versatile reagents in organic synthesis. In particular, diaryldichalcogenides (R2E2 ; E = Se, Te) and aryltellurenyl/selenyl halides (REX) find application in forming carbon-carbon double bond under mild experimental conditions. We have prepared and characterised a number of these type of compounds by the ortholithiation route. More recently we have studied catalytic conversion of olefins to allyl ethers by the use of bis(2-dimethylaminomethyl)diselenide and Cu(II) salts.

c). Organometallic precursors for chemical vapour depositon of Group II-VI semiconductors:

            The synthesis and characterisation of single source stoichiometric precursors to group 12-16 (II-VI) semiconductors have been the subject of intense recent interest. In our approach to the problem, we have designed chalcogenolates containing additional donor functionality viz., 1-Me2NCH2C6H4-2-Se- and succeeded in isolating and characterising monomeric mercury selenolates. As desired, the selenolates are stable, monomeric, volatile and on thermal decomposition afford HgSe. Recently we have isolated the corresponding Cd and Zn chalcogenolates. Very recently we have isolated the first air stable novel mercury tellurolate.

d). Developments of Synthetic Compounds with Glutathione Peroxidase Activity

            The importance of selenium/tellurium has been recognized in the biological processes involving the enzyme glutathione peroxidase which catalyse the reduction of superoxide and hydroperoxides that are detrimental to life. Recently, some synthetic organoselenium/tellurium compounds have been reported to have glutathione peroxidase like activity.  It has been suggested that the presence of intramolecular Se....N and SeO coordination is crucial for the biomimitic activity of these compounds.  To further understand the role of intramolecular coordination in the biomimitic activity we have initiated a study on the glutathione peroxidase activity of some new organochalcogens having SeN and Se...O intramolecular interactions. These studies have resulted in isolation of novel selenenate esters and ebselen derivatives which are stabilized by intramolecular coordination.s