in toluene mixt. of Sb and Sn deriv. was allowed to stand in an evacuated glass ampoule at room temp. for 72 h; crystals of (p-Tol)4SbBr filtered off; filtrate evapd; residue chromd. on SiO2; identified by elem. anal. and NMR spectrum;

in toluene mixt. of equimolar amts. of Sb and Sn deriv. was allowed to stand in an evacuated glass ampoule at room temp. for 24 h; crystals of (p-Tol)4SbBr filtered off; filtrate evapd; residue chromd. on SiO2; identified by elem. anal.;

in toluene mixt. of Sb and Sn deriv. in a molar ratio 2:1 was allowed to stand in an evacuated glass ampoule at room temp. for 24 h; crystals of (p-Tol)4SbBr filtered off; filtrate evapd; residue chromd. on SiO2; identified by elem. anal. and NMR spectrum;

in not given Grignard react.; elem. anal.;