in tetrahydrofuran under Ar, THF soln. of (DCPE)NiCl2 frozen by liquid N2, addn. of (CH3)3SiPH2, mixt. warmed to -20°C and stirred for 12 h; volume reduced in vac. at -20°C, cooled for 24 h at -78°C, pptn., filtration at -20°C, dried in vac. at -20°C;

in tetrahydrofuran under Ar, stirred for 3 h at 20°C; removal of the volatiles, recrystn. from toluene at -78°C, dried in vac. (20°C, 1 h); detn. of intermediates by NMR-spectroscopy;

in tetrahydrofuran under Ar, stirred for 3 h at 20°C; removal of the volatiles, recrystn. from toluene at -78°C, dried in vac. (20°C, 1 h); detn. of intermediates by NMR-spectroscopy;

in tetrahydrofuran under Ar, stirred for 3 d at 20°C; removal of the volatiles (20°C, vac.), recrystn. from toluene at -78°C, dried in vac. (20°C, 1 h); elem. anal.;

in tetrahydrofuran under Ar, THF soln. of (DCPE)NiCl2 frozen by liquid N2, addn. of (CH3)3SiPH2, mixt. warmed to -20°C and stirred for 12 h; volume reduced in vac. at -20°C, cooled for 24 h at -78°C, pptn., filtration at -20°C, dried in vac. at -20°C;

in tetrahydrofuran under Ar, stirred for 3 h at 20°C; removal of the volatiles, recrystn. from toluene at -78°C, dried in vac. (20°C, 1 h); detn. of intermediates by NMR-spectroscopy;

in tetrahydrofuran under Ar, room temp., 14 d; molar product ratio ((DCPE)Ni)2P2 : (DCPE)2Ni = 1:1;