Dimethylindium(III), dimethylthallium(III), and methylmercury(II) derivatives of the dodecahydro-nido-decaborate(2–) ion

Abstract

Deprotonation of decaborane(14) by trimethylindium yields two derivatives. [Me₂ln]⁺[B₁₀H₁₂lnMe₂]^– and [B₁₀H₁₂lnMe]. The analogous reaction with trimethylthallium produces [Me₂Tl]⁺[B₁₀H₁₂TIMe₂]^– and [Me₂Tl]⁺[B₁₀H₁₃]^–. The presence of two distinct dimethylmetal groups in the compounds [Me₂M]⁺[B₁₀H₁₂MMe₂]^–, one of which is co-ordinated by the dodecahydro-nido-decaborate(2–) anion, is based on analytical data, electrical conductivity, i.r. and n.m.r. spectra, and chemical reactions of the compounds. Metathetical reactions of [Me₂Tl]⁺-[B₁₀H₁₂TlMe₂]^– lead to [Ph₃PMe]⁺[B₁₀H₁₂TlMe₂]^– and to the new organomercury complex [Ph₃PMe]⁺-[B₁₀H₁₂HgMe]^– for which physical data are also presented.