TRANSITION-METAL COMPLEXES OF MONOHYDROXAMIC ACIDS

Complexes of monohydroxamic acids and Fe(III), Co(II), Ni(II) and Cu(II) are shown to involve chelation via the oxygen atoms of the donor ligand. Spectral and magnetic properties of the complexes of Fe(III), Co(II), and Ni(II) indicate octahedral coordination with the latter two metal ions forming polymeric species. The monohydroxamic acid complexes show slightly larger 10Dq values than the corresponding aquo and acetylacetonato complexes. Cu(II) forms a square planar complex probably with a dxy ground state. © 1979.