New Re(I) tricarbonyl-diimine complexes with N,N′-bis(substituted benzaldehyde)-1,2-diiminoethane Schiff base ligands: Synthesis, spectroscopic and electrochemical studies and crystal structures

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• 作者：Valiollah Mirkhani ; Reza Kia ; Akbar Rostami Vartooni ; Hoong-Kun Fun
• 关键词：Tricarbonylrhenium(I) complexes ; Diimine ligands ; X-ray crystallography
• 刊名：Polyhedron
• 出版年：2010
• 出版时间：19 April 2010
• 年：2010
• 卷：29
• 期：6
• 页码：1600-1606
• 全文大小：931 K

文摘

The syntheses, structures and spectroscopic properties of tricarbonylrhenium(I) complexes with N,N′-bis(2-bromo, 4-bromo, 4-chloro and 3-methoxybenzaldehyde)-1,2-diiminoethane Schiff base ligands have been investigated in this paper. Characterization of these complexes was carried out with FTIR, NMR, UV–Vis spectroscopy, elemental analysis and X-ray crystallography. The electrochemical behavior of the investigated complexes has been studied by cyclic voltammetry. The crystal structures of the 4-chloro, 4-bromo and 4-methoxy substituted complexes are stabilized by intermolecular C–HCl and C–HO hydrogen bonds. The remarkable features of the 2-bromo, 4-bromo and 4-chloro substituted complexes are short intermolecular halogen–oxygen contacts. In the 4-bromo complex, short intermolecular BrO and OO contacts link neighboring molecules along the [1 0 0] direction, which are further stabilized by short intermolecular ππ interactions. In 2-bromo complex, intermolecular BrO interactions link neighboring molecules into 1D extended chains along the [0 1 0] and [0 0 1] directions, forming a 2D network which is parallel to the bc-plane.