in diethyl ether byproducts: CH3OH; treating with moist ether, sepn. of NaCl and S, filtrate evapn. in vacuum; ppt. washing (hot water), Sn-compd. remaining on the filtration paper, N-compd. pptn. on cooling (5°C), residue insoluble in ether were Sn-containing sulfite and Sn-containing sulfate; IR spectroscopy;

in diethyl ether byproducts: CH3OH; treating with moist ether, sepn. of NaCl and S, filtrate evapn. in vacuum; ppt. washing (hot water), Sn-compd. remaining on the filtration paper, N-compd. pptn. on cooling (5°C), residue insoluble in ether were Sn-containing sulfite and Sn-containing sulfate; IR spectroscopy;