Cu(II) Compounds with Pyrimidine-Based Chelating Ligands, Bridged by a Flexible Alkyl Spacer: Synthesis, Characterisation and X-Ray Structures of Methoxide-Bridged Dinuclear-Based Species

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• 作者：Gerard A. van Albada ; Maarten G. van der Horst ; Ilpo Mutikainen ; Urho Turpeinen and Jan Reedijk
• 关键词：Copper(II) ; Pyrimidine ; Flexible spacer ; Crystal structure ; Hydrogen bond
• 刊名：Journal of Chemical Crystallography
• 出版年：2009
• 出版时间：May, 2009
• 年：2009
• 卷：39
• 期：5
• 页码：358-363
• 全文大小：382.3 KB

文摘

Abstract The synthesis and full structural characterisation is described of 3 dinuclear-based Cu(II) compounds bridged by methoxide anions, and flexible linear bis(pyrimidine)-α,ω-diaminoalkane ligands. The structures are dinuclear based in all cases, in which the bis(pyrimidine)diaminoalkane ligand chelates to 2 Cu(II) ions in the same dinuclear unit (N–C–C–C–C–C–N linker), or to two different dinuclear units (with the short N–C–C–N linker), thereby generating a polymeric chain. The magnetic exchange in the compounds is dominated by the alkoxido-bridged ligands, which generate a very strong antiferromagnetic coupling between the Cu(II) ions, resulting in diamagnetism at room temperature and below, and EPR silent behaviour.