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).

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