AIBN in neat (no solvent) (N2 or Ar); educts mixt. in molar ratio 1/1 warmed slowly to 70°C for 8-15 h with stepwise addn. of AIBN; distd. (vac.); elem. anal.;

in neat (no solvent) byproducts: Me4Sn; heating of the react. mixt. at ca 60°C, then 1-2 d at room temp., treatment with hexane, filtration, evapg. of filtrate, adding of Me3SnCl, repeating of procedure; crystn. from benzene/hexane or ppn. with H2O from EtOH soln.; elem. anal.;