Synthesis, characterization and crystal structure of hetero-metal clusters RCCo2M(CO)8(CH3Cp) and RCCoM2(CO)7(CH3Cp)2

Six hetero-metal clusters RCCo(2)M(CO)(8)Cp' and RCCoM(2)(CO)(7)Cp'(2) (R = Ph, C2H5O2C; M = Mo, W; Cp' = CH(3)Cp) were synthesized by refluxing a solution of the clusters RCCo(3)(CO)(9) and NaM(CO)(3)Cp' in THF through metal exchange reactions, in which the metal unit Co(CO)(3) in the RCCo(3)(CO)(9) cluster was exchanged by M(CO)(2)Cp'. The clusters were characterized by elemental analysis, IR and H-1 NMR along with the crystal structure of [C2H5O2CCCoMo2(CO)(7)Cp'(2)].