Bridged Heterocyclium Dicationic closo-Icosahedral Perfluoroborane, Borane, and Carborane Salts via Aqueous, Open-Air Benchtop Synthesis
Organic Letters2010Vol. 12(12), pp. 2714–2717
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Scott A. Shackelford, John L. Belletire, Jerry A. Boatz, Stefan Schneider, Amanda K. Wheaton, B.A. Wight, Herman L. Ammon, Dmitry V. Peryshkov, Steven H. Strauss
Abstract
Thirteen bridged triazolium and imidazolium dicationic salts, which uniquely pair closo-icosahedral perfluoroborane [B12F12]2−, borane [B12H12]2−, or carborane [CB11H12]− anionic species with unsaturated bridged heterocyclium dications, were synthesized using an aqueous benchtop method. This considerably extends the scope of a reported aqueous synthesis of binary [heterocyclium]2[B12H12] and [heterocyclium][CB11H12] salts. Also, the one-step preparation of five new precursor bridged heterocyclium dicationic dihalide salts using conventional procedures and in one case a microwave-assisted method is described.
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