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首页> 外文期刊>Polyhedron: The International Journal for Inorganic and Organometallic Chemistry >EPR characterisation of nickel(III) complexes with N2O2 Schiff base ligands derived from naphthaldehyde and their pyridine adducts
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EPR characterisation of nickel(III) complexes with N2O2 Schiff base ligands derived from naphthaldehyde and their pyridine adducts

机译:EPR表征镍(III)与源自萘醛的N2O2席夫碱配体及其吡啶加合物

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摘要

Nickel(II) complexes with quadridentate N2O2 Schiff base ligands derived from naphthaldehyde have been synthesised and their oxidative chemistry was studied in N,N'-dimethylformamide and in dimethylsulfoxide. Electrochemical and EPR data for the oxidised solutions have revealed that in these strong coordinating solvents, only the complexes with aliphatic imine bridges were oxidised to low spin six-coordinate nickel(III) complexes, in a (2)A(1)(d(z)(2)) ground state, formulated as [Ni(III)(L). S-2](+), where S stands for a solvent molecule. Upon addition of pyridine to fluid solutions of [Ni(III)(L). S-2](+), new species were formed that on the basis of their EPR spectra can be formulated as [Ni(III)(L). py(2)](+). Extensive electronic characterisation of the NI(III) compounds was made by coupling EPR and electronic spectroscopic data. (C) 1998 Elsevier Science Ltd. All rights reserved. [References: 53]
机译:合成了具有四萘二酚的四价N2O2席夫碱配体的镍(II)配合物,并在N,N'-二甲基甲酰胺和二甲基亚砜中研究了它们的氧化化学。氧化溶液的电化学和EPR数据表明,在这些强配位溶剂中,只有具有脂肪亚胺桥键的配合物在(2)A(1)(d( z)(2))基态,公式为[Ni(III)(L)。 S-2](+),其中S代表溶剂分子。向[Ni(III)(L)的液体溶液中添加吡啶后。 S-2](+),形成了新物种,根据其EPR光谱可将其表示为[Ni(III)(L)。 py(2)](+)。通过耦合EPR和电子光谱数据对NI(III)化合物进行了广泛的电子表征。 (C)1998 Elsevier ScienceLtd。保留所有权利。 [参考:53]

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