CH 406 : Thermal and Photochemical Reactions (Half semester)


Photochemical activation and potential energy surfaces. Geometry, dipole moments, acid-base and redox properties of excited states. Uni- and bimolecular deactivations. Quenching mechanisms. Electronic energy transfer mechanisms. Intramolecular (isomerizations, rearrangements and dissociation) and intermolecular (additions) photochemical processes. Electrocyclic reactions- Frontier orbital, orbital and state correlation diagrams, conservation of orbital symmetries, and aromatic transition state approaches to electrocyclic processes. Woodward-Hoffmann rules. Thermal and photochemical pericyclic reactions. Cycloaddition reactions. FMO, orbital and state correlation diagrams, and aromatic transition state approaches. Various [2+2] and [4+2] cycloaddition reactions. Alder ‘Ene Reaction’. Sigmatropic reactions. Photochemical cycloadditions. Cheletropic reactions.

Text References

1) R. B. Woodward and R. Hoffmann, “The Conservation of Orbital Symmetry”, Academic Press, New York, 1971.
2) M. J. S. Dewar and R. C. Dougherty, “The PMO Theory of Organic Chemistry”, Plenum Press, New York, 1975.
3) T. L. Gilchrist and R. C. Storr, “Organic Reactions and Orbital Symmetry”, 2nd Edn., Cambridge University Press, Cambridge, 1979.
4) R. P. Wayne, “Principles and Applications of Photochemistry”, Oxford Science Publications, Oxford University Press, Oxford, 1988.
5) A. Gilbert and J. Baggot, “Essentials of Molecular Photochemistry”, Blackwell Scientific Publications, Oxford & Boston, 1991.
6) M. Klessinger and J. Michl, “Excited States and Photochemistry of Organic Molecules”, VCH Publishers, Inc., New York, 1994.
7) I. Fleming, “Pericyclic Reactions”, Oxford University Press, Oxford, 1998.
8) A. Rauk, “Orbital Interaction Theory of Organic Chemistry”, 2nd Edn., Wiley Interscience, New York, 2001.
9) S. Sankararaman, "Pericyclic Reactions- A Textbook", Wiley-VCH, Weinheim, 2005.