doi:10.1021/ic3014267
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Acid-Induced Opening of [closo-B10H10]2- as a New Route to 6-Substituted nido-B10H13 Decaboranes and Related Carboranes

       
       
        Oleg Bondarev , Yulia V. Sevryugina , Satish S. Jalisatgi , and M. Frederick Hawthorne *
       
        Protonation of the polyhedral anion [closo-B₁₀H₁₀]^2- under superacidic conditions apparently generates an electrophilic intermediate, [B₁₀H₁₃]⁺, that forms 6-R-nido-B₁₀H₁₃ (R = aryl, alkyl, triflate) derivatives by electrophilic aromatic substitution, C-H bond activation, or ion-pair collapse, respectively. The proposed mechanism of formation of the 6-R-nido-B₁₀H₁₃ derivatives via the boranocation [B₁₀H₁₃]⁺ is discussed. The synthesis of carboranes, starting from 6-R-nido-B₁₀H₁₃ decaboranes, and single-crystal X-ray diffraction analyses of several 6-R-nido-B₁₀H₁₃ decaboranes and carboranes are described.
       
       
来源：生物谷