TRANSITION METAL CHEMISTRY, cilt.26, ss.232-236, 2001 (SCI-Expanded)
A new binucleating ligand incorporating four oxime groups, butane-2,3-dione O-[4-aminooxy-2,3-bis-(2-hydroxyimino-1-methyl-propylideneaminooxymethyl)-but-2-enyl]-dioxime, (H(4)mto), has been synthesized and its dinuclear cobalt(III), copper(II), and homo- and hetero-tetranuclear copper(II)-manganese(II) complexes have been prepared and characterized by H-1- and C-13-n.m.r., i.r., magnetic moments and mass spectral studies. Elemental analyses, stoichiometric and spectroscopic data indicate that the metal ions in the complexes are coordinated to the oxime nitrogen atoms (C=N) and the data support the proposed structure for H(4)mto and its complexes. Moreover, dinuclear cobalt(III) and copper(II) complexes of H(4)mto have a 2:1 metal:ligand ratio.