C2H4(P(C6H5)2)2 in tetrahydrofuran; toluene byproducts: C5H5N, CO, H2; Treating of suspn. of diphos and (H-py)Br in THF with Nb-complex at room temp. under a CO atmosphere.; Immediate react. with evolution of CO and H2 (gas chromy.) obsd. Stirring (2 h, room temp.), removal of THF (vac., room temp.), dissolving of residue (toluene, CO), stirring (2 h), filtn., treating with n-heptane. Sepn. of microcryst., elem. anal.;
C2H4(P(C6H5)2)2 in tetrahydrofuran; toluene byproducts: C5H5N, CO, H2; Treating of suspn. of diphos and (H-py)Br in THF with Ta-complex at room temp. under a CO atmosphere.; Immediate react. with evolution of CO and H2 (gas chromy.) obsd. Stirring (2 h, room temp.), removal of THF (vac., room temp.), dissolving of residue (toluene, CO), stirring (2 h), filtn., treating with n-heptane. Sepn. of microcryst., elem. anal.;
