Molecular structures of 1,12-B₁₂H₁₀(CO)₂ and its dihydrate 1,12-B₁₂H₁₀[C(OH)₂]₂—a novel bis-carbene complex

Abstract

Crystal structures of the dicarbonyl 1,12-B₁₂H₁₀(CO)₂ and its hydrated form 1,12-B₁₂H₁₀(CO₂H₂)₂·4H₂O show little π-bond character in their B–C bonds but contain significant distortions from the regular B₁₂ icosahedron geometry; the hydrate, until now thought to be a hydroxonium salt, contains dihydroxycarbene (‘protonated carboxylic acid’) ligands C(OH)₂.

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