catalyst: Pd bis(dibenzylideneacetone)/P(OC2H5)3 in toluene heating soln. of (CH3)3SnCCH (20 mmol) and (CH3)CH(Sn(CH3)2)4CH(CH3) (10 mmol) in toluene for 15 h at 75°C in presence of palladium bis(dibenzylidene acetone) (3 molpercent) and P(OC2H5)3 (6 molpercent);; removing toluene under water-pump vac.; Kugelrohr distn. at 120°C/0.001 torr; formation of 10percent ((CH3)3Sn)2CHCH3 is observed;;

dibenzoyl peroxide in hexane Irradiation (UV/VIS); a soln. in hexane was UV-irradiated for 15 h with stirring at -50 to -70°C (inert atm.); filtered, evapd. at reduced pressure and room temp., distilled in vac., not sepd., detected by NMR spectra;

in neat (no solvent) byproducts: trimethyltin bromide; under Ar, molar ratio stannylalkane : Me2SnBr2 = 1:2, heated at 80-90°C for 8 h; Me3SnBr removed in vac., fractional crystn., elem. anal.;