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;

aluminium trichloride in benzene N2 atm.; heating (50°C); evapn. (vac.), recrystn. (pentane, -80°C);

in further solvent(s) byproducts: C6H6; liq. HCl, 10 time excess; 16 h, 0°C; evapn., recrystn. (pentane, -80°C);