The 1-thio-eta2-alkyne-complex [Tp'(CO)2W(BnSCCS)][Tp'= hydrotris(3,5-dimethylpyrazolyl)borate; Bn = benzyl], which was obtained by reductive removal of the benzyl group at the alkyne complex [Tp'(CO)2W(BnSCCSBn)]PF(6), has been established as a ligand in a combined organometallic/Werner type heterobimetallic complex with Cu(I).