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首页> 外文期刊>Spectrochimica acta, Part A. Molecular and biomolecular spectroscopy >Electron spin resonance and magnetic studies on some copper(II) azobarbituric and azothiobarbituric acid complexes
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Electron spin resonance and magnetic studies on some copper(II) azobarbituric and azothiobarbituric acid complexes

机译:某些铜(II)偶氮巴比妥酸和偶氮硫代巴比妥酸络合物的电子自旋共振和磁性研究

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摘要

Electron spin resonance and magnetic susceptibility on some copper(II) complexes prepared from phenylazobarbituric and phenylazothiobarbituric acid compounds containing 2,5-dichloro and 2,5-dimethyl groups were discussed. The thio complexes exist in dimer-monomer mixture. The corresponding copper(II) complexes of the oxygen homologous failed to exhibit association. Singlet-triplet separation values equal to -321 and -263 cm(-1) for the 2,5-dimethyl and 2,5-dichloro complexes, respectively, of the thio series. An empirical measure of the amount of tetrahedral deformation based on the values of g()/A() assigned the square-planar geometry of the dimethyl-oxygen complex while the other complexes are with tetrahedral planar geometries. The effect of temperature on the ESR data was discussed. The diamagnetic properties of the complexes derived from 2,5-dichloro and 2,5-dimethyl thiobarbituric acid suggested the formation of Cu(I) compelxes. (C) 2004 Elsevier B.V. All rights reserved.
机译:讨论了由含2,5-二氯和2,5-二甲基的苯基偶氮巴比妥酸和苯基偶氮硫代巴比妥酸化合物制备的某些铜(II)配合物的电子自旋共振和磁化率。硫配合物以二聚体单体混合物形式存在。相应的氧同源的铜(II)配合物未能表现出缔合。对于硫代系列的2,5-二甲基和2,5-二氯配合物,单重态-三重态分离值分别等于-321和-263 cm(-1)。基于g()/ A()值的四面体变形量的经验度量,该值指定了二甲基-氧配合物的正方形平面几何形状,而其他配合物具有四面体平面几何形状。讨论了温度对ESR数据的影响。衍生自2,5-二氯和2,5-二甲基硫代巴比妥酸的配合物的抗磁特性表明形成了Cu(I)化合物。 (C)2004 Elsevier B.V.保留所有权利。

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