(1,2-Dicarba-closo-dodecaboranyl)trimethylmethanaminium iodide

Abstract

The title compound, [1-(CH3)3NCH2-1,2-C2B10H11]+·I− or C6H22B10N+·I−, was obtained by the reaction of (1,2-dicarba-closo-dodecaboranyl)dimethylmethanamine with methyl iodide. The asymmetric unit contains two iodide anions and two (o-carboranyl)tetramethylammonium cations. The bond lengths and angles in the carborane cage are within normal ranges, but the N—Cmethylene—Ccage angle is very large [120.2 (2)°] because of repulsion between the carborane and tetramethylammonium units. In the crystal, ions are linked through C—H...I hydrogen bonds.