in tetrahydrofuran under Ar; addn. of phosphine and THF to NiCl2, reflux, 24 h; removing volatiles in vac., dissolving residue in pentane, allowing to stand at -80°C, 4 d, cannulating mother liquor, washing ppt. twice with cold pentane (-78°C), drying in vac.; elem. anal.;

hydrogenchloride in ethanol; water in aq. ethanolic soln. at 130°C during 8 h (atm. pressure of CO);;

2: SO2 View Scheme

in 1,2-dichloro-ethane slow;

2: SO2 View Scheme

2: SO2 View Scheme

removing of the solvent and excess alkene in vac.;

in acetonitrile Electrochem. Process; polarography of 10(exp-3) M solution;