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Copper(II) complexes with organic ligands. XXII. Spectral and magnetic properties of phenoxy- and methylphenoxyacetatocopper(II) complexes with pyridine-N-oxide and 2-methylpyridine-N-oxide

G. Plesch, O. Švajlenová, J. Krätsmár-Šmogrovič, and M. Kohútová

Institute of Inorganic Chemistry, Centre of Chemical Research, Slovak Academy of Sciences, CS-842 36 Bratislava

Abstract:  Copper(II) complexes of the composition Cu(R—COO)₂L_n, were prepared by the reactions of pyridine-N-oxide and 2-methylpyridine-iV-oxide with corresponding phenoxy-, 2- and 3-methylphenoxyacetatocopper(II) hydrates. Their e.s.r. spectra, electronic spectra, and magnetic properties were studied. When R—COO is the 2-methylphenoxyacetate anion and L is the pyridine-N-oxide, then n equals 2. This is a magnetically diluted complex of tetragonal symmetry. In all other cases n equals 1. The complex Cu(phoac)₂- (pyo) is antifetTomagnetic and its susceptibility data have been fitted to various models for polynuclear complexes. The spectral and magnetic data of other complexes of this group indicate that the complexes are dimeric with bridging carboxyl groups and N-oxide bound monodentately in the axial positions of the complex molecule.

Full paper in Portable Document Format: 372a169.pdf

Chemical Papers 37 (2) 169–182 (1983)