Pentadiynylidyne and Pentacarbido Complexes

Abstract

The reaction of the halocarbyne [W(≡CBr)(CO)2(Tp*)] (Tp*=hydrotris(3,5‐dimethylpyrazol‐1‐yl)borate) with trimethylsilyl‐butadiyne, mediated by [Pd(PPh3)4] and CuI, affords the first pentadiynylidyne complex [W(≡CC≡CC≡CSiMe3)(CO)2(Tp*)]. Desilylation provides a general route to heterobimetallic pentacarbido complexes, including [(Tp*)(CO)2W(μ‐C5)(PPh3)2Ru(η‐C5H5)] and [(Ph3P)2(CO)HIr{(μ‐C5)W(CO)2(Tp*)}2]. Show more