tetrachloromethane; 2,2'-azo-bisisobutyronitrile in tetrachloromethane byproducts: CHCl3; a soln. of Sn-compound in CCl4 was heated at 90°C for 2 h in thepresence of AIBN; evapd., recrystd. from C6H6; elem. anal.;

in hydrogenchloride recrystn. (Me2CO); elem. anal.;