New Coordination Architectures of Dithioether Ligand with Silver Salts: Effect of Anions on Complex Structures
Ya-Bo Xie A B , Jian-Rong Li A and Xian-He Bu A CA Department of Chemistry, Nankai University, Tianjin 300071, China.
B College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100022, China.
C Corresponding author. Email: buxh@nankai.edu.cn
Australian Journal of Chemistry 59(1) 34-39 https://doi.org/10.1071/CH05290
Submitted: 21 October 2005 Accepted: 18 December 2005 Published: 31 January 2006
Abstract
Reactions of a flexible dithioether ligand, 2,3-bis(5-methyl-1,3,4-thiadiazole-2-thiomethyl)quinoxaline (L), with AgX (X = ClO4ˉ or PF6ˉ) lead to the formation of two new one-dimensional (1D) silver(i) complexes: {[AgL](ClO4)}∞ 1 and {[Ag2L(CH3OH)](PF6)2(CH3OH)}∞ 2, which have been characterized by elemental analysis, IR spectroscopy, and X-ray crystallography. Although 1 and 2 are synthesized under the same conditions, they take different structures due to the difference in anions in the silver salts. In 1, each ligand supplies three N-donors to bridge two silver atoms to result in a chain structure, and all silver atoms in the chain possess the same coordination geometry. In 2, each ligand gives six N-donors to coordinate to two silver atoms of different geometries, forming a 1D chain. The changes in counteranions affect the coordination mode of the ligand and the geometry of the Ag(i) centre, and consequently give rise to complexes with different structures. The coordination features of the ligand have also been primarily investigated through density functional theory calculations.
Acknowledgments
This work was financially supported by the National Natural Science Foundation of China (no. 20373028).
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