Synthesis and Properties of Iodinated Nickel Imineoximes

Abstract

Reactions with iodine of binuclear nickel (II) complexes Ni₂ (dox-enEt₂)₂ (X[dbnd]I, ClO₄), where Hdox-enEt₂ denotes a ligand IIb, has yielded complexes of the type Ni₂ (dox-enEt₂)₂X_xY_y, X and Y being I or ClO₄ and x and y the number of X and Y, respectively. These new complexes most probably have a binuclear skeletal structure. On the basis of magnetic and spectral data including laser Raman spectra, the nickel complexes obtained are classified into the following three types: (a) purple-red, diamagnetic, (b) orange brown, paramagnetic (1.6–1.7 BM per nickel), and (c) dark brown, paramagnetic (1.3 BM per nickel). It is most likely that the oxidation state of nickel is two for type (a), while complexes of types (b) and (c) possibly contain partially oxidized nickel ions.