New monocarbaboranes from stepwise degradation of lcosahedral 1,2- and 1,7-C2B10H12 dicarbaboranes

Abstract

Specific degradation reactions of the ‘reactive isomer’ of the [C₂B₁₀H₁₃]^– anion, [r-C₂B₁₀H₁₃]^–, result in the removal of one or two carbon atoms from the cage to produce a series of monocarbaboranes 9-Me-10-HO-nido-[7-CB₁₀H₁₁]^–, 8-Me₃N-arachno-4-CB₈H₁₂, and arachno-4-CB₇H₁₂, together with the binary borane 2-Me-nido-B₆H₉; further reactions give the compounds 8-Me₃N-9-Me-nido-6-CB₉H₁₀, arachno-4,6-CSB₇H₁₁, and closo-[1-CB₇H₈]^–.