in neat (no solvent) inert atmosphere; slow addn. of dichlorostibine to eexcess of Bu3SnH (room temp.) with continuous fractional distn. of product (vac., condensing at -196°C);

in neat (no solvent) inert atmosphere; slow addn. of dichlorostibine to excess of Bu3SnH (room temp.) with continuous fractional distn. of product (vac., condensingat -196°C); Z-isomer present in traces (NMR);