aluminum tribromide in benzene N2-atmosphere; saturation of soln. of silane-AlBr3 with HBr for 1 h; evapn., addn. of heptane, filtration, evapn., not sepd.; NMR spectroscopy;

in further solvent(s) dry HBr;

HBr High Pressure; according to Hengge, Bauer, (1975) Monatsh. Chem. 106: 503; sublimation in vac., recrystn. from n-hexane under highly pure N2;

in n-heptane followed by NMR;