Coordination chemistry of the ligand 7-aza-1-hydroxy-benzotriazole. Crystal structures and antimicrobial activity of the catena-poly-[μ-chlorido(μ-7-aza-1-oxy-κ²N:O-benzotriazolyl-κN)]cobalt(II)methanol coordination poly

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• 作者：Mohamed Ghazzali ; Khalid Al-Farhan ; Ayman El-Faham ; Jan Reedijk
• 关键词：Crystal structure ; Coordination polymer ; Antimicrobial activity ; Polymorphism
• 刊名：Polyhedron
• 出版年：2010
• 出版时间：22 September 2010
• 年：2010
• 卷：29
• 期：14
• 页码：2829-2832
• 全文大小：571 K

文摘

Reaction of cobalt chloride and 7-aza-1-hydroxy-benzotriazole (HOazbt) in alcoholic solution results in formation of the polymeric compound [Co(C₅H₃N₄O)(CH₃OH)Cl]_n. The compound has been characterized by elemental analysis, IR spectroscopy, and its 3D structure was determined by X-ray diffraction. Also its antimicrobial activity was determined.

The distorted octahedral high-spin cobalt(II) coordinated by both coordinated mono- and bidentate ionized HOazbt ligands, is featuring a two-dimensional (6, 4) honey-comb-like coordination polymer. The 2D hexagonal layers are interconnected with a strong O–HO (8) second-level hydrogen bonding ring motif in the a-direction. A new free-ligand polymorph is found, and its 3D has been structure determined. H-bonding interactions in the three polymorphs are discussed using the DFT/MP2 and Hirshfeld surface calculations.