in tetrahydrofuran; diethyl ether mixture of PhMgBr and Sb-compound is stirred at -70°C; the soln. was made basic with concd. NaOH, (CH3O)2SO2 was added at 5°C, heating to 70°C for 15 min, further products: octamethylcyclotetrasiloxane, α-methylbenzenemethanol; VPC-analysis;

sulfuric acid in tetrahydrofuran; diethyl ether C6H5MgBr in ether was added dropwise to a soln. of (CH3)3CC6H3O2SbCl in anhydrous THF (argon atmosphere), stirring at -70°C for 2.5h, addition of 6M H2SO4, heating at 60°C for 1h; VPC-analysis;