Routes to high-nuclearity mixed-metal clusters; the synthesis and X-ray structure analysis of the [N(PPh3)2]+ salts of [Os10C(CO)24AuBr]–, [Os20Au(C)2(CO)48]2–, and [Os20Hg(C)2(CO)48]2–

Abstract

The large anionic clusters [Os₂₀M(C)₂(CO)₂₄]^2–(M = Au or Hg) have been prepared from the dianion [Os₁₀C(CO)₂₄]^2–, and their metal framework structures and the overall structures of [Os₁₀C(CO)₂₄AuBr]^–, an intermediate in the formation of the gold compound, have been established by X-ray single crystal analyses.