Syntheses, Structures of Four New Complexes Constructed by Flexible Pyridine Ligand and the Relationship Between Conformations and Structures

Chem. J. Chinese Universities ›› 2010, Vol. 31 ›› Issue (5): 867.

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Syntheses, Structures of Four New Complexes Constructed by Flexible Pyridine Ligand and the Relationship Between Conformations and Structures

JI Chang-Chun¹, XU Zheng-Jiang¹, LI Jing¹, LIU Guang-Xiang², ZHENG He-Gen^1,3*

1. State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China;
2. Anhui Key Laboratory of Functional Coordination Compounds, School of Chemistry and Chemical Engineering, Anqing Normal University, Anqing 246003, China;
3. State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China

Received:2009-09-10 Online:2010-05-10 Published:2010-05-10
Contact: ZHENG He-Gen. E-mail: zhenghg@nju.edu.cn
Supported by:
国家自然科学基金(批准号: 20971065)和国家“九七三”计划项目(批准号: 2007CB925103, 2010CB923303)资助.

Abstract

Abstract:

Four new complexes [Co(pcaede)₂Cl₂·2CH₃CN·H₂O]_n(1), [Co(pcaede)₂Cl₂·H₂O]_n(2), [Hg(pcaede)I₂]_n(3) and [Hg(pcaede)Br₂]_n(4) were prepared with a flexible ligand 3-pyridinecarboxylic acid 1,2-ethanediyl ester(pcaede) and Co/Hg salts. They were characterized by elemental analysis, IR and X-ray single-crystal diffraction. Complexes 1 and 2 both have an one-dimensional(1D) chain sturcture with channels. Complex 3 processes a 1D meso-helix sturcture, and complex 4 exhibits a 1D infinite zig-zag chain structrue. The results demonstrated that the solvent molecules filled in channels and counteranions have a significant impact on the assembly of the complexes. Moreover, theoretical calculations were carried about the conformation of the ligand in four complexes.

Key words: Crystal structure; Flexible ligand; Conformation; Theoretical calculation

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JI Chang-Chun, XU Zheng-Jiang, LI Jing, LIU Guang-Xiang, ZHENG He-Gen*. Syntheses, Structures of Four New Complexes Constructed by Flexible Pyridine Ligand and the Relationship Between Conformations and Structures[J]. Chem. J. Chinese Universities, 2010, 31(5): 867.

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Syntheses, Structures of Four New Complexes Constructed by Flexible Pyridine Ligand and the Relationship Between Conformations and Structures

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