catalyst: Pd bis(dibenzylideneacetone)/P(OC2H5)3 in toluene heating soln. of (CH3)3SnCCH (20 mmol) and CH2(Sn(CH3)2)4CH2 (10 mmol) in toluene for 30 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 3percent ((CH3)3Sn)2CH2 and 10percent (CH3)6Sn2 is observed;;

catalyst: Pd bis(dibenzylideneacetone)/P(OC2H5)3 in toluene heating soln. of (CH3)3SnCCH (20 mmol) and CH2(Sn(CH3)2)4CH2 (10 mmol) in toluene for 30 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 3percent ((CH3)3Sn)2CH2 and 10percent (CH3)6Sn2 is observed;;

tetrakis(triphenylphosphine) palladium(0) in xylene A soln. of reagents in xylene was heated for 15 h at 85°C in thepresence of (PPh3)4Pd;; evapd., Kugelrohr distillation;;