The interaction of Ni(acac) 2 with diethylaluminum chloride in the presence of triphenylphosphine has been studied. Complexes of nickel, [(Ph 3 P) 3 NiCl] 2 and Ni(acac 2 PPH 3 not so far described, have been isolated. Thermal decomposition of [(Ph 3 P) 3 NiCl] 2 had yielded (Ph 3 P) 2 NiCl 2 , NiCl 2 , and metallic Ni. Dissociation of [(Ph 3 P) 3 NiCl] 2 in THF solution has been studied by the ESR method. A new Ni(I) complex, [(Ph 3 P) 3 Ni(CH 3 CN)]BF 4 , has been obtained by interaction of [(Ph 3 P) 3 NiCl] 2 with acetonitrile in the presence of TlBF 4 . The structure of penta-coordinate complex of nickel, Ni(acac) 2 PPh 3 has been established by IR and NMR ( 1 H, 13 C, and 31 P) spectroscopy. The reaction of Ni(acac) 2 PPh 3 with diethylaluminum bromide has been shown to yield (Ph 3 P) 3 Ni(H)Br and(Ph 3 P) 2 NiBr 2 .
