Metal carbonyls and other complexes with  p-acceptor ligands. Metal to metal bonds and metal atom clusters. Transition metal complexes with bonds to hydrogen, alkyls, alkenes and other related compounds. The role of insertion, oxidative addition, reductive elimination, associative dissociative reaction in catalysis. The use of organotransition metal complexes for conversion of unsaturated and related compounds. Hydrogenation (monohydride, dihydride catalysts, stereoselective hydrogenation), carbonylation (Monsanto acetic acid Process, hydroformylation, hydrocarboxylation, hydrocyanation), transition metal carbenes (olefin metathesis, carbonyl olefination, Fischer carbenes, Schrock carbenes, catalytic cyclopropanation). Metallocene complexes, organo-phosphine complexes, Complexes with MC triple bonds: carbynes.  Application of organometallic complexes in stereo- and regio-selective reactions, alkene polymerization reactions.