The properties of nitritobis(ethylenediamine)nickelate(II) halides

Abstract

The properties of a series of complexes [Ni(en)2(ONO)]X, where X = Cl–, Br–, or I–, have been examined and compared with complexes of known crystal structure where X = NO2–, ClO4–, or BF4–. The magnetic data for the halide complexes indicate, a 3A2g ground state for the nickel(II) ion in a magnetically dilute, essentially octahedral environment. The electronic spectra suggest a trans-octahedral configuration for the nickel ion with no evidence that the halide ions are co-ordinated. The electronic and infrared spectra are consistent with a symmetrically bridging nitrito-group.