Synthesis and X-ray crystal structure of 3-diethyldithiocarbamato-3-aura-1,2-dicarbadodecaborane. A ‘slipped’ 18-electron metallacarborane

Abstract

Reaction of Tl₂(7,8-C₂B₉H₁₁) with Et₂NCS₂AuBr₂ affords the known ion (1,2-C₂B₉H₁₁)₂Au^–, and also the novel 18-electron species (1,2-C₂B₉H₁₁)Au(S₂CNEt₂) which is shown from X-ray data to have the ‘slipped’ structure previously found only in 20- or 21-electron systems; a similar structure is also deduced for the 18 electron compound (Ph₃P)₂Pt(1,2-C₂B₉H₁₁).