Structural characterization of the nickel(II) formate complex, Ni(py)4(O2CH)2·2py, and re-evaluation of the nitrate counterpart, Ni(py)4(ONO2)2·2py: Evidence for non-linear nitrate coordination

Abstract

The molecular structure of the nickel formate compound, Ni(py)4(O2CH)2·2py, has been determined by X-ray diffraction, thereby demonstrating that the formate ligand coordinates in a unidentate manner. A similar investigation of the nitrate compound, Ni(py)4(ONO2)2·2py, indicates that the nitrate ligand also coordinates in a unidentate manner; however, the Ni–O–NO2 bond angle is distinctly bent, in contrast to the linear geometry that was previously reported.