Author： Sao Yun Chen Ya-Guang Zhu Dong-Sheng Liu Qun
Publisher： Taylor & Francis Ltd
ISSN： 0095-8972
Source： Journal of Coordination Chemistry, Vol.59, Iss.5, 2006-03, pp. : 537-544
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Abstract
The binuclear copper(II) complex [Cu 2 (dyma) 2 (phen) 2 ]·4H 2 O·2DMF (Na 2 dyma=sodium 2-[1,3]-dithiolan-2-ylidene-malonate, phen=1,10-phenanthroline) has been synthesized and characterized by analysis, IR and electronic spectroscopy, and variable temperature magnetic susceptibility measurements. A single-crystal X-ray diffraction analysis shows that each copper atom exhibits distorted square-pyramidal coordination geometry, bonded to two oxygen atoms of dyma, two nitrogen atoms of phen and an oxygen atom from a neighbouring molecule, thus forming a binuclear complex. The binuclear units form columns along the b axis via &pgr;–&pgr; interactions between phen ligands. Hydrogen bonds between 1D columns lead to a 2D network. IR and electronic spectra are consistent with the structure. In the temperature range 230–290K, the complex exhibits weak antiferromagnetic behaviour and, below 230K, ferromagnetic behaviour.
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