in tetrahydrofuran to a slurry of a complex a soln. of (NPCl2)3 was added at -78°C,a mixture was stirred for 12 h at room temp.; N2 atm.; evapn.; extn. (CH2Cl2); filtrn. through silica gel, evapn.; column chromy. (silica gel, hexane); evapn.; elem. anal.;