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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >A 1,8-naphthalenediol-based unsymmetrical dinucleating ligand
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A 1,8-naphthalenediol-based unsymmetrical dinucleating ligand

机译：基于1,8-萘二醇的不对称双核配体

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摘要

A facile synthesis of 2-formyl-1,8-naphthalenediol is reported. Its potential as a general precursor for the preparation of unsymmetrical multidentate chelating ligand systems based on 1,8-naphthalenediol is demonstrated by the synthesis of the dinucleating ligand L4- (H4L = N, N'-bis(2-(1,8-naphthalenediol) methylidene) propylenediamine). Reaction of H4L with copper acetate results in the formation of the unsymmetrical dinuclear Cu-II complex [LCu2] (3), which has been structurally characterized by single-crystal X-ray diffraction. One Cu-II ion is coordinated by a N2O2 compartment of L4- and the other Cu-II ion is coordinated by an O-4 compartment of L4- while they are bridged by two aryloxide functions of L4-. A dimerization of two molecules of 3 to a tetranuclear entity 32 occurs through formation of weak apical Cu-O interactions. Analysis of the temperature dependent magnetic susceptibility measurements (2-290 K) established a strong intradimer exchange coupling J(12) = -371 cm(-1). This strong superexchange interaction fits nicely in a magneto-structural correlation which has been established for dinuclear bis(phenoxide)-bridged Cu-II complexes demonstrating the electronic equivalence of the aryloxides of a phenol and 1,8-naphthalenediol.
机译：据报道，容易合成2-甲酰基-1，8-萘二醇。通过合成双核配体L4-（H4L = N，N'-bis（2-（1,8-）可以证明其作为制备基于1,8-萘二醇的不对称多齿螯合配体系统的一般前体的潜力。萘二醇），亚甲基），丙二胺）。 H4L与乙酸铜的反应导致形成不对称的双核Cu-II络合物[LCu2]（3），其结构已通过单晶X射线衍射表征。一个Cu-II离子由L4-的N2O2间隔配位，另一个Cu-II离子由L4-的O-4间隔配位，而它们由L4-的两个芳氧基官能团桥接。通过形成较弱的顶端Cu-O相互作用，两个3的分子二聚为四核实体32。对温度依赖性磁化率测量值（2-290 K）的分析建立了牢固的二聚体交换耦合J（12）= -371 cm（-1）。这种强的超交换相互作用很好地适合了磁结构相关性，该磁结构相关性已针对双核双（酚盐）桥联的Cu-II络合物建立，证明了苯酚和1,8-萘基芳基氧化物的电子等效性。

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