in benzene byproducts: NH4Cl; addn. of Me3SnCl soln. to a suspn. of ammonium diphenylmonothiophosphinate in stoichiometric amts., refluxing for 2 h with stirring; sepn. of NH4Cl by filtration, evapn., recrystn.;

in cyclohexane byproducts: (CH3)3SnCl; exclusion of moisture; refluxing for 1.5 h, standing for a night at room temp.; filtration, washing with cyclohexane and ether, recrystn. from ether; elem. anal.;