Binuclear Metal Complexes. X. Preparation and Magnetism of Mononuclear and Binuclear Copper(II) Complexes of Schiff Bases Derived from 4,6-Diacetylresorcine and Polyamines
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概要
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New binuclear complexes Cu<SUB>2</SUB>X<SUB>2</SUB>dar(en-R)<SUB>2</SUB> and [Cu<SUB>2</SUB>dar(dien)<SUB>2</SUB>](ClO<SUB>4</SUB>)<SUB>2</SUB>·H<SUB>2</SUB>O were synthesized, H<SUB>2</SUB>dar(A)<SUB>2</SUB>being a Schiff base prepared from 4,6-diacetylresorcinol and an amine A;A stands for <I>N</I>,<I>N</I>-dialkylethylenediamine-(=en-R, R=C<SUB>2</SUB>H<SUB>5</SUB> or <I>iso</I>-C<SUB>3</SUB>H<SUB>7</SUB>) or diethylenetriamine(=dien). Mononuclear complexes CuXHdar(en-R) were also prepared for comparison. Two copper(II) ions of the binuclear complexes are separated from each other by the benzene ring. Magnetic susceptibilities of the compounds were measured in the temperature range 77.4∼300 K. It was found by means of the plots of χ<SUB>A</SUB><SUP>−1</SUP> <I>versus</I> <I>T</I> that all the compounds obey the Curie-Weiss law. The Weiss constants for the binuclear complexes (−10∼−34 K) indicate the presence of antiferromagnetic interactions between copper(II) ions through the conjugated π-system of 4,6-diacetylresorcinol moiety, whereas those of the mononuclear complexes are practically zero, showing that the intermolecular interaction is negligibly small.
- 公益社団法人 日本化学会の論文
著者
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Okawa Hisashi
Department Of Chemistry Faculty Of Science Kyushu University
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Kida Sigeo
Department of Chemistry Wakayama University
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Manada Noriaki
Department of Chemistry, Faculty of Science, Kyushu University
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