Synthesis of dinuclear anionic complexes [Cp*Rh(CO)]2- and [Cp*Rh(CO)]22- by dissolving metal reduction and R[Cp*Rh(CO)]2- by addition of alkyllithium reagents across the metal-metal double bond of [Cp*Rh(CO)]2. Stereoselective synthesis of symmetrical and mixed dinuclear dialkyls [Cp*2Rh2(CO)2(R1)(R2)] and a study of their ligand-induced fragmentation reactions