Reactions of dialkynyl compounds of group IVB elements with metal carbonyls

Complexes of Group IVB elements and metal carbonyls of general formulae [R2MFe(CO)4]2, [R2MFe(CO)3PPh3]2, and R2M(C⋮C·R′)2[Co(CO)3]4(where R,R′= alkyl or aryl; M = Si, Ge, and Sn) have been obtained from the reactions of alkynyl compounds of Group IVB elements with metal carbonyls. The preparations, properties, and reactions of the secomplexes are described. The structures are inferred from infrared and nuclear magnetic resonance spectra.