C2H4(P(C6H5)2)2 in tetrahydrofuran; toluene byproducts: C5H5N, CO, H2; Treating of suspn. of diphos and (H-py)I 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.;

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, stirring (1 h, room temp.).; Removal of solvent (vac.), dissolving of brown residue in toluene, filtn., treatment with n-heptane, cooling (-30°C), elem. anal.;

in water byproducts: CO, H2; React. of starting materials at room temp. (N2 or Ar).; Evolution of gas (CO, H2) obsd. (gas chromy.). Extn. (Et2O) of resulting red soln., drying (vac.) of collected ether ext. Addn. of a second equiv of (H-Quin)Cl dissolved in H2O to the extd. mixt. causes vigorous evolution of CO and H2. IR spectroscopy.;

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.;

in tetrahydrofuran byproducts: CO; React. of starting materials in THF (N2 or Ar).;