1H NMR Studies on Cationic Motions in Solid tert-Butylammonium Hexachlorostannate (IV)

Abstract

AbstractThe temperature dependences of the 1H spin-lattice relaxation time (T1) and the second moment (M2) of NMR absorptions were measured for anhydrous tert-butylammonium hexachlorostannate(IV) and its partially deuterated analogs [(CD3)3CNH3]2SnCl6 and [(CH3)3CND3]2SnCl6. Three kinds of cationic motions were revealed: the reorientations of the CH3 group about their C - C bonds, the NH+3 group about its C - N bond, and the tert-butyl group about the C - N bond. Their motional parameters were determined. Among the three motions, the NH+3 motion occurs at the lowest temperature with quite a small activation energy (9.9-10.0 kJ mol-1 ) .