Synthesis, spectral, electrochemical and magnetic properties of new phenoxo-bridged dicopper(II) complexes derived from unsymmetrical binucleating ligands

P. Amudha; M. Thirumavalavan; M. Kandaswamy

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Synthesis, spectral, electrochemical and magnetic properties of new phenoxo-bridged dicopper(II) complexes derived from unsymmetrical binucleating ligands

机译：非对称双核配体衍生的新型苯氧桥双铜（II）配合物的合成，光谱，电化学和磁性

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New unsymmetrical binucleating ligands 4-bromo-2-[(4-methylpiperazin-1-yl)methyl]-6[N-(3,5-dimethyl-2-hydroxy-benzyl)-N-methylaminomethyl]phenol (H_2L~1) and 4-bromo-2-[4-methyl-piperazin-1-yl)methyl]-6-[N-(3,5-dichloro2-hydroxybenzyl)-N-cyclo-hexylminomethyl] phenol (H_2L~2) and their copper(II) complexes [Cu_2L~(1-2)(X)]ClO_4, (X = OH, Br, OAc) have been prepared. Spectral, electrochenuical and magnetic behaviors have been studied. Electrochemical study of the complexes shows two distinct quasireversible redox peaks. (E_(pc)~1 = -0.35 to -0.70 V, E_(pc)~2 = -0.75 to -0.97 V). Variable temperature magnetic susceptibility studies of the complexes show the presence of antiferromagnetic interaction between the copper atoms (-2J = 69-124 cm~(-1)). A comparison of the electrochemical and magnetic behavior of the complexes derived from both the ligands is discussed on the basis of substitutional steric and electronic effects.

机译：新的不对称双核配体4-溴-2-[（4-甲基哌嗪-1-基）甲基] -6 [N-（3,5-二甲基-2-羟基-苄基）-N-甲基氨基甲基]苯酚（H_2L〜1 ）和4-溴-2- [4-甲基哌嗪-1-基）甲基] -6- [N-（3,5-二氯2-羟基苄基）-N-环己基氨基甲基]苯酚（H_2L〜2）和制备了它们的铜（II）配合物[Cu_2L〜（1-2）（X）] ClO_4，（X = OH，Br，OAc）。已经研究了光谱，电化学和磁行为。配合物的电化学研究显示了两个不同的拟可逆氧化还原峰。（E_（pc）〜1 = -0.35至-0.70 V，E_（pc）〜2 = -0.75至-0.97 V）。配合物的变温磁化率研究表明，铜原子之间存在反铁磁相互作用（-2J = 69-124 cm〜（-1））。基于取代的空间和电子效应，讨论了两种配体衍生的配合物的电化学和磁性行为的比较。

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来源
《Polyhedron: The International Journal for Inorganic and Organometallic Chemistry》 |1999年第9期|共7页
作者
P. Amudha; M. Thirumavalavan; M. Kandaswamy;
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正文语种 eng
中图分类化学;无机化学;
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binucleating ligands; binuclear copper(II) complexes; electrochemical studies; magnetic studies;

机译：双核配体;双核铜（II）配合物;电化学研究;磁性研究;

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Synthesis, spectral, electrochemical and magnetic properties of new phenoxo-bridged dicopper(II) complexes derived from unsymmetrical binucleating ligands

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