magnesium in diethyl ether byproducts: MgClBr; under Ar; prepn. of Grignard reagent in Et2O (yield: 85-90percent), sepn. of excess Mg, dropwise addn. of the Grignard soln. to germane soln., refluxed, 4 h; addn. of 20percent NH4Cl, sepn., ethereal phase washed (distd. H2O, aq. NaHCO3), dried (MgSO4), sepn., fractional distn.; elem. anal.;

magnesium in diethyl ether byproducts: MgBr2; under Ar; prepn. of Grignard reagent in Et2O (yield: 85-90percent), sepn. of excess Mg, dropwise addn. of the Grignard soln. to germane soln., refluxed, 4 h; addn. of 20percent NH4Cl, sepn., ethereal phase washed (distd. H2O, aq. NaHCO3), dried (MgSO4), sepn., fractional distn.; elem. anal.;

(i) Mg, Et2O, (ii) ClSiPh3; Multistep reaction;