...
首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >The structure, magnetism and EPR spectra of a (mu-thiophenolato)(mu-pyrazolato-N, N') double bridged dicopper(II) complex
【24h】

The structure, magnetism and EPR spectra of a (mu-thiophenolato)(mu-pyrazolato-N, N') double bridged dicopper(II) complex

机译:(mu-thiophenolato)(mu-pyrazolato-N,N')双桥双铜(II)配合物的结构,磁性和EPR光谱

获取原文
获取原文并翻译 | 示例
           

摘要

A new binuclear copper(II) complex, namely [Cu2L(pz)(DMSO)], where L = 2,6-bis[(2-phenoxy)iminomethyl]- 4-methylthiophenolate(3-) and pz = pyrazolate ligand, has been synthesized by a one-pot synthesis involving copper(II) acetate monohydrate, the S-protected ligand precursor 2-(N, N-dimethylthiocarbamato)- 5-methylisophthalaldehyde di-2'-hydroxy anil, (I), and pyrazole, in which a metal-promoted S-deprotection reaction occurs during the formation of the complex. This was characterized by routine physicochemical studies, single crystal X-ray diffraction and electron paramagnetic resonance (EPR) techniques. The structure analysis reveals that there are copper centres in two different environments, a slightly distorted square planar and a distorted square-pyramidal, arranged in binuclear units. The EPR study of these binuclear units performed at 9.4 GHz in the temperature range between 4 and 293 K shows an antiferromagnetic interaction between Cu-II ions, and allows evaluating g factors g(x) = 2.068(1), g(y) = 2.091(1) and g(z) = 2.165(1), with < g > = 2.108(1), an exchange coupling parameter J(0) = -26(1) cm(-1) (defined as H-ex = -J(0) S1 . S2), and a zero field splitting of the ground triplet state described by D = 86(2) x 10(-4) cm(-1) and E = -48(3) x 10(-4) cm(-1). These results are discussed and compared with the existing literature.
机译:一种新的双核铜(II)配合物,即[Cu2L(pz)(DMSO)],其中L = 2,6-双[(2-苯氧基)亚氨基甲基] -4-甲基硫代苯酚酸酯(3-),pz =吡唑酸酯配体,已经通过一锅合成法合成,该一锅法合成法包括一水合乙酸铜(II),S保护的配体前体2-(N,N-二甲基硫代氨基甲酸酯)-5-甲基间苯二甲醛二-2'-羟基茴香醚,(I)和吡唑,其中在络合物形成过程中发生了金属促进的S-去保护反应。这是通过常规的物理化学研究,单晶X射线衍射和电子顺磁共振(EPR)技术来表征的。结构分析表明,铜的中心位于两个不同的环境中,即以双核单位排列的略微扭曲的正方形平面和扭曲的正方形-金字塔形。这些双核单位的EPR研究在4 GHz至293 K之间的温度范围内于9.4 GHz进行,表明Cu-II离子之间存在反铁磁相互作用,并可以评估g因子g(x)= 2.068(1),g(y)= 2.091(1)和g(z)= 2.165(1),其中 = 2.108(1),交换耦合参数J(0)= -26(1)cm(-1)(定义为H-ex = -J(0)S1。S2),并且由D = 86(2)x 10(-4)cm(-1)和E = -48(3)x 10描述的基态三重态的零场分裂(-4)厘米(-1)。对这些结果进行了讨论,并与现有文献进行了比较。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号