in ethanol byproducts: HCl; stirred under reflux for 2 h; cooled, recrystn. (EtOH);

in benzene byproducts: ammonium chloride; stirred under reflux for 1 h; filtered (NH4Cl), evapd. in vac., crystd. on standing, recrystd. (EtOH);

in benzene byproducts: H2O; refluxed; evapn., crystn. (EtOH), recrystn. (EtOH);

air in ethanol suspn. of HS2PPh2 in EtOH added to suspn. of Sn compd. in EtOH; stirredfor 15 min; suspn. of semicarbazone ligand (molar ratio 1:1:1) in EtOH added; stirred for 7 d; filtered; soln. stored at 0°C; filtered; solid vac. dried (dithiophosphinato complex); remaining mother liquor concd. in air (monothiophosphinato complex); elem. anal.;