Spectral and structural studies of a new oxalato-bridged dinuclear copper(II) complex having two 3-(thiophen-2-yl)-1,10-phenanthroline ligands in a trans configuration |
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| Authors: | Wei Huang Takuji Ogawa |
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| Affiliation: | a State Key Laboratory of Coordination Chemistry, Nanjing National Laboratory of Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Hankou Road, 22, Nanjing, Jiangsu 210093, PR China
b Research Center for Molecular Nanoscience, Institute for Molecular Science, National Institutes of Natural Sciences, 5-1 Higashiyama, Myodaiji-cho, Okazaki, Aichi 444-8787, Japan |
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| Abstract: | In this paper, spectral and structural characterizations of a new dinuclear copper(II) complex (1), formulated as [Cu2(3-(thiophen-2-yl)-1,10-phenanthroline)2(μ-oxalate)(DMF)2](ClO4)2 (DMF = N,N′-dimethylformamide), have been described. Two five-coordinate copper(II) centers are bridged by a four-dentate oxalate dianion forming a planar molecular geometry with the Cu-Cu separation of 5.117(4) Å. The two ligands in 1 adopt a trans configuration to each other and two monodentate DMF molecules are positioned at each side of the molecular plane. In addition, typical π-π stacking interactions are found between adjacent phenanthroline and thiophene rings forming a layered packing structure. A compressed pyramidal configurational alteration is observed for each copper(II) center when the temperature is decreased from 291(2) to 100(2) K. |
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| Keywords: | 3-(Thiophen-2-yl)-1,10-phenanthroline Oxalate Dinuclear copper(II) complex Coordination geometry |
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