AlCl3 in neat (no solvent) slow heating of a mixt. of Sn-compd., SnCl4 and AlCl3 to 210°C under N2, keeping at this temp. for 4 h; cooling to room temp., addn. of Et2O, filtn., cooling to 0°C, crystn., recrystn. from n-hexane, evapn. of mother liquor yields second crop, elem. anal.;

in diethyl ether 6 h; Inert atmosphere;

1: in diethyl ether 2 h; 2: in benzene 10 h;

1: tetrahydrofuran View Scheme

in diethyl ether