in pentane (Ar); reaction of Pd complex suspended in C5H12 with C2H4 (-30°C), filtration, addn. of soln. of phosphine (2 equivalents in C5H12, -78°C), crystn., evapn. to dryness (-78°C, high vacuum); not purified, 90percent pure (NMR);

in further solvent(s) (Ar); addn. of phosphine to soln. of Pd complex in hepta-1,6-diene, evapn. (in vacuo); washing (Et2O), drying (in vacuo); identified by NMR;