in diethyl ether; toluene addn. of equimolar amts. of Me3SiPPh2 in toluene to satd. soln. of (p-MePh)2(CH2CHPh)SnCl in ether, 1h, room temp., stirred, distn. under vac.,under Ar; elem. anal.;

in diethyl ether; toluene addn. of equimolar amts. of Me3SiP(t-Bu)2 in toluene to satd. soln. of (p-MePh)2(CH2CHPh)SnCl in ether, 1h, room temp., stirred, distn. under vac., under Ar; elem. anal., byproducts detected by NMR;