Fundamental concepts in transition metal chemistry for organic synthetic transformations Metal carbenes, synthesis, reactivity, analogy with ester groups for oxy carbenes, cycloaddition reactions of metal carbenes, synthesis of fused ring systems, Dotz reaction, mechanism of ring formation, application in targeted organic synthesis. Application of cobalt carbonyls in organic synthesis, Pauson Khand reaction and cyclopentenone synthesis, Vollhardt reaction. Use of metal carbonyls in organic syn