Ambidentate character of oxime groups in metal complexes. The crystal structure of (4-methyliminopentane-2,3-dione 3-oximato)(4-iminopentane-2,3-dione 3-oximato)nickel(II)

Abstract

The crystal structure of (4-methyliminopentane-2,3-dione 3-oximato) (4-iminopentane-2,3-dione 3-oximato)nickel(II) has been determined by Patterson methods from 2582 independent reflexions, measured with Cu Ka radiation on an automatic diffractometer. The structure was refined by least-squareSo methods to R = 2.9 %. The monoclinic cell of dimensions a= 8.468, b = 19.953, c = 8.419 A, fl= 107.66 has 4 molecules per unit cell and space group P21/c. The analysis reveals that the former ligand is chelated to the nickel atom via its oximino nitrogen atom, and the latter ligand via its oximino oxygen atom in the essentially planar molecule.