Syntheses and reactivity of acetylide-containing clusters of Group 1B metals. Stepwise syntheses of trinuclear [Au2Cu(C2Ph)4]– and pentanuclear [Au3Cu2(C2Ph)6]– and [Au3Ag2(C2Ph)6]– clusters

Abstract

The pentanuclear cluster [Au₃Cu₂(C₂Ph)₆]^– was obtained from the reaction between [{Au(C₂Ph)}_n] and a mixture of [Au(C₂Ph)₂]^– and [{Cu(C₂Ph)}_n]. Its structure is described. The same cluster has been synthesized in a stepwise manner starting with [Au(C₂Ph)₂]^– through the binuclear complex [Au₂(C₂Ph)₃]^– and the trinuclear cluster [Au₂Cu(C₂Ph)₄]^–. The synthesis of the analogous gold–silver cluster [Au₃Ag₂(C₂Ph)₆]^– was achieved by a slightly modified method.