| Spectroscopic Studies of a Three-dimensional, Five-coordinated Copper(Ⅱ) Complex via Hydrogen Bonds: [Cu(PDA)(H_2O)_2](H_2PDA=Pyridine-2,6-dicarboxylic Acid) |
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| 作者姓名： | WANG Wen zhen * LIU Xin MENG Yi LIAO Dai zheng * JIANG Zong hui YAN Shi ping and WANG Geng lin . |
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| 作者单位： | WANG Wen zhen 1，*，LIU Xin 1，MENG Yi 1，LIAO Dai zheng 1，* JIANG Zong hui 1，2，YAN Shi ping 1 and WANG Geng lin 1 1. Department of Chemistry，Nankai University，Tianjin 300071，P. R. China; 2. State Key Laboratory of Coordination Chemistry，Nanjing University，Nanjijng 210093，P. R. China |
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| 基金项目： | Supported by the National Natural Science Foundation of China(No.2 0 0 710 19，2 0 0 710 2 0，and5 0 172 0 2 ) and the Re-
search Fund for Doctoral Program of Higher Education. |
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| 摘 要： | IntroductionFive- coordinated complexes with d9- configuredcations have received much attention stereochemi-cally,spectrochemically and biologically,and havebeen comprehensively discussed1] . Usually thereare two stable configurations for the copper( )complexes with five equal coordinating atoms:anapically elongated square pyramid( SP) and a com-pressed trigonal bipyramid( TBP) ,with an obviousenergetic preference for the latter coordination.When the ligands are rigid and provide angular d…
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| 关 键 词： | Crystal structure Three dimensional network ESR spectrum Tetragonal pyramid geometry Hydrogen bond π π interaction |
Spectroscopic Studies of a Three-dimensional, Five-coordinated Copper(Ⅱ) Complex via Hydrogen Bonds: [Cu(PDA)(H2O)2](H2PDA=Pyridine-2,6-dicarboxylic Acid) |
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| WANG Wen zhen ,*,LIU Xin ,MENG Yi ,LIAO Dai zheng ,* JIANG Zong hui ,,YAN Shi ping and WANG Geng lin ..Spectroscopic Studies of a Three-dimensional, Five-coordinated Copper(Ⅱ) Complex via Hydrogen Bonds: [Cu(PDA)(H2O)2](H2PDA=Pyridine-2,6-dicarboxylic Acid)[J].Chemical Research in Chinese University,2003,19(1). |
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| Authors: | WANG Wen-zhen LIU Xin Meng Yi LIAO Dai-zheng JIANG Zong-Hui YAN Shi-Ping WANG Geng-lin |
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| Abstract: | A new copper(Ⅱ) complex Cu(PDA)(H2O)2] was synthesized and its structure was determined. Cu(Ⅱ) is five-coordinated in a tetragonal pyramid geometry. The two coordinating water molecules are different and the two Cu-O bond lengths differ by nearly 0.02 nm. The whole crystal is linked to form a three-dimensional network by means of hydrogen bonds. The X-band ESR spectrum shows three different g tensors with a well-resolved hyperfine structure in the gz signal, giving the ESR parameters gx=2.05, gy=2.065 and gz=2.29. The covalency of the coordinate bonds and the deviation from tetragonal pyramid geometry for the complex are discussed based on the ESR spectra. |
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| Keywords: | Crystal structure Three-dimensional network ESR spectrum Tetragonal pyramid geometry Hydrogen bond |
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