Novel Carbon Monochalcogenide Coordination Mode: [Rh₂{μ-SeCMo(CO)₂(Tp*)}₂(η⁴-cod)₂] (Tp* = hydrotris(3,5-dimethylpyrazol-1-yl)borate; cod = cyclo-octa-1,5-diene)

The reaction of [Et₄N]­[Mo­(CSe)­(CO)₂(Tp*)] (Tp* = hydrotris­(3,5-dimethylpyrazol-1-yl)­borate) with [Rh₂(μ-Cl)₂(η⁴-cod)₂] (cod = cyclo-octa-1,5-diene) results in the formation of the tetrametallic complex [Rh₂{SeCMo­(CO)₂(Tp*)}₂(η⁴-cod)₂] in which the CSe ligand adopts a crystallographically confirmed and unprecedented μ₃:σ,σ′(Se),σ″(C) coordination mode.