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Thirteen bridged triazolium and imidazolium dicationic salts, which uniquely pair closo-icosahedral perfluoroborane B(12)F(12)(2-), borane B(12)H(12)(2-), or carborane CB(11)H(12)(-) 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)B(12)H(12) and heterocycliumCB(11)H(12) 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.
W R Reilly (Sat,) studied this question.