diethyl ether; mercury dibromide T=25°C;

magnesium in diethyl ether exclusion of oxygen and moisture; t-butylgrignard compound prepd. from 1.5 mol Mg and 1.2 mol t-BuCl in ether; 0.27 mol of powdered HgCl2 added slowly to 0.58 mol of t-BuMgCl in ether under cooling; mixt. stirred for 12 h at room temp.; addn. of Na-K tartrate for phase sepn.; org. phase sepd. and stirred with hexane; drying over Na2SO4; solvent removed in vac.; residue dissolved in hexane; soln. evapd.; solid sublimated at 40°C in vac.;

byproducts: (-CH2CH2CH2Hg)n;

decompn. on standing;

decompn. on standing;

decompn. on standing;

sodium tetrahydroborate 1.) benzene, irradiation; Yield given. Multistep reaction. Yields of byproduct given. Title compound not separated from byproducts;

in not given byproducts: Hg, iso-C4H10; reaction for 12 h at 20°C;;

in hexane byproducts: Hg; reaction at -30°C;;

sodium tetrahydroborate 1.) benzene, irradiation; Yield given. Multistep reaction. Yields of byproduct given. Title compound not separated from byproducts;