Alkoxo- and carboxylato-bridged hexanuclear copper(II) complex: Synthesis,structure and magnetic properties |
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| Affiliation: | 1. MOE Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, P. R. China;2. Department of Chemistry, School of Science, The University of Jordan, Amman 11942, Jordan;3. International Institute for Carbon-Neutral Energy Research (I2CNER), Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan;1. Department of Chemistry, Inorganic Section, Jadavpur University, Kolkata 700032, India;2. School of Chemistry, The University of Reading, P.O. Box 224, Whiteknights, Reading RG6 6AD, UK |
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| Abstract: | Reaction of copper(II) nitrate trihydrate with N,N-dimethylethanolamine (dmea) and pivalic acid in methanol led to the hexanuclear copper(II) complex Cu6(η1:μ2-C4H10NO)4(η1:η1:μ2-C5H9O2)4(η1:μ1-C5H9O2)2(μ3-OH)2 (1). The crystal structure of 1 indicates that hexametallic centers are bridged by the μ3-alkoxo, dmea oxygens, and the μ2-dicarboxylato oxygen atoms of pivalate ions. Furthermore, in the asymmetric unit, three types of copper ions have been found labeled as Cu1, Cu2 and Cu3. The Cu2 takes a distorted octahedral shape, whereas Cu1 and Cu3 adopt square pyramidal geometries. The complex 1 shows strong antiferromagnetic interactions through the oxo groups within the dimeric units (J = ? 82.6 to ? 25.8 cm? 1) and weak antiferromagnetic couplings between the dimers (J = ? 10.9 and 0.8 cm? 1). |
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