PREPARATION, PROPERTIES AND BOND RATIOS OF BENZOPHENON IMINO-NICKEL(0) COMPLEXES

Benzophenonimine (I) can be bonded to nickel(0), by treatment with (COD)2Ni (II) in the presence of 2,2′-bipyridine (bipy) (III) to give (bipy)Ni-(C6H5)2CNH (IV). In the absence of (III) a 2 1 complex Ni[(C6H5)2CNH]2 (V) is formed. The structures of (IV) and (V) were established by IR, 1H and 13C NMR spectroscopic methods. (V) is monomeric in solution whereas in the solid state an X-ray structural analysis shows the presence of trimeric {Ni-[(C6H5)2CNH]2}3 units which form (NiN)3 six-membered rings. © 1979.