Spectroscopic Studies of a Three-dimensional, Five-coordinated Copper(Ⅱ) Complex via Hydrogen Bonds: [Cu(PDA)(H2O)2](H2PDA=Pyridine-2,6-dicarboxylic Acid)

Chemical Research in Chinese Universities ›› 2003, Vol. 19 ›› Issue (1): 6-9.

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Spectroscopic Studies of a Three-dimensional, Five-coordinated Copper(Ⅱ) Complex via Hydrogen Bonds: [Cu(PDA)(H₂O)₂](H₂PDA=Pyridine-2,6-dicarboxylic Acid)

WANG Wen-zhen¹, LIU Xin¹, MENG Yi¹, LIAO Dai-zheng¹, JIANG Zong-hui^1,2, YAN Shi-ping¹, WANG Geng-lin¹

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

Received:2001-12-25 Online:2003-01-24 Published:2011-08-06
Supported by:
Supported by the National Natural Science Foundation of China(No.20071019, 20071020, and 5017202) and the Research Fund for Doctoral Program of Higher Education.

Abstract

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 g_z signal, giving the ESR parameters g_x=2.05, g_y=2.065 and g_z=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.

Key words: Crystal structure, Three-dimensional network, ESR spectrum, Tetragonal pyramid geometry, Hydrogen bond, π-&pi, interaction

WANG Wen-zhen, LIU Xin, MENG Yi, LIAO Dai-zheng, JIANG Zong-hui, YAN Shi-ping, 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 Universities, 2003, 19(1): 6-9.

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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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