Scheme 2.

A) Rapid substitution of P2CoCOD by CO and formation of bis(phosphine)cobalt dicarbonyl dimer (ref. 11). B) Fast substitution of [P2CoCOD]+ by CO and formation of cationic bis(phosphine)cobalt tricarbonyl.

A) Rapid substitution of P2CoCOD by CO and formation of bis(phosphine)cobalt dicarbonyl dimer (ref. 11). B) Fast substitution of [P2CoCOD]+ by CO and formation of cationic bis(phosphine)cobalt tricarbonyl.