C2H4(P(C6H5)2)2; I2 in tetrahydrofuran; toluene byproducts: CO; Treating of suspn. of starting compd. in THF with I2 (-78°C, N2 or Ar). Evolution of gas and formation of red soln. takes place upon mixing. Addn. of diphos at -50°C, slow warming of mixt. up to -10°C.; Removal of solvent (vac., -10°C), dissolving of residue in toluene, filtn. (-10°C). Addn. of cold n-heptane causes sepn. of brown solid. Isolation by filtn., recrystn. from toluene/n-heptane, elem. anal.;

H2O in tetrahydrofuran Treatment of suspn. of (Me-Acr)BPh4 in THF with NaV(CO)6 (N2 or Ar). Evolution of gas and pptn. of colorless solid is obsd. Stirring (15 h, room temp.).; Removal of solvent (vac.), treatment of residue with H2O, filtn., washing of org. solid (H2O), drying (vac.), anal. and spect. identification. Addn. of Bu4NBr to yellow soln. causes sepn. of V-compd. which is filtered and dried in vac.;