catalyst: azobisisobutyronitrile in neat (no solvent) equimolar amts. of the alkyne and Me3SnH were heated at 70°C under Ar in the presence of a catalytic amt. of AIBN for 3-4 h (IR and (1)H NMR monitoring); PhOCH=C(SnMe3)2 to PhO(Me3Sn)C=CHSnMe3 ratio 95:5, total yield 64percent; the reaction mixt. was distilled under reduced pressure (b.p. 90°C/0.001 mm Hg); elem. anal. for the isomeric mixt., isomers were not sepd.;

catalyst: azobisisobutyronitrile in neat (no solvent) equimolar amts. of the alkene and Me3SnH were heated at 70°C under Ar in the presence of a catalytic amt. of AIBN for 3-4 h, reaction was monitored by IR and (1)H NMR spectroscopy; volatiles were removed by heating at 60°C and 0.001 mm Hg;