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Copper(II) complexes with organic ligands. XV. Magnetic properties of copper(II) benzoate complexes of heterocyclic N-oxides

M. Mělník and J. Krätsmár-Šmogrovič

Department of Inorganic and Organic Chemistry, Faculty of Pharmacy, Komenský University, 880 o4 Bratislava

 

Abstract: Copper(II) benzoate complexes of composition Cu(C6H5COO)2L (L = pyridine-N-oxide, quinoline-N-oxide, or some their methyl derivatives) have even at room temperature markedly lower magnetic moments than are the spin values corresponding to Cu2+ ions. Their magnetic behaviour studied ir the temperature range 93 — 303 К is typical for antiferromagnetism, with the Néel temperature Tm = 268 ± 12 К . From equilibrium constants of the singlet-triplet interaction the values of enthalpy (ΔH°)  and entropy (ΔS°)   were estimated. Magnetic properties of the studied complexes indicate that they belong to the copper(II) carboxylate complexes with a binuclear bridged structure. Copper(II) acetate monohydrate is a typical example of this type.

Full paper in Portable Document Format: 275a594.pdf

 

Chemical Papers 27 (5) 594–599 (1973)

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