in n-heptane byproducts: dimethyltin dichloride; glovebox; addn. of 1 equiv. of BCl3 as 1 M soln. in heptane to a flask contg. dimethyldiaryltin and heptane at room temp., sealing, stirring at room temp. for 30 min, heating at 100°C in oil bath for 24-48 h; cooling, decantation, removal of volatiles, recrystn. from petroleum ether at -35°C;

boron trichloride in dichloromethane T=-80°C;

1: not given 2: n-heptane View Scheme

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