Bi‐ and Polynuclear Transition‐Metal Carbon Tellurides

The first examples of bi‐ and polynuclear tellurocarbonyl complexes were obtained from the reactions of [W(≡CTe)(CO) 2 (Tp*)]NEt 4 (Tp*=hydrotris(dimethylpyrazolyl)borate) with [MCl(PCy 3 )]/TlPF 6 (M=Cu, Au) or [Au 2 Cl 2 (μ‐dppm)], which afford [WM(μ‐CTe)(PCy 3 )(CO) 2 (Tp*)] (M=Cu, Au) and [WAu 2 (μ‐CTe)(μ‐dppm)(CO) 2 (Tp*)] 3 (PF 6 ) 3 . In all cases it is specifically the tellurocarbonyl that assumes a bridging, but in each case distinct, role including examples of isotellurocarbonyl, semi‐bridging and σ–π coordination and combinations thereof. Tetrametallic complexes bridged by C 2 Te and C 2 Te 2 ligands are also described.