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Paramagnetic ruthenium(III) complexes bearing O,O chelating ligands: Synthesis, spectra, molecular structure and electron transfer properties
Raja, N; Ramesh, R; Liu, Y;刘宇(多)
2012
发表期刊POLYHEDRON
卷号31期号:1页码:196-201
摘要Paramagnetic Ru(III) complexes of the type [RuX2(EPh3)(2)(L)] (where X = Cl or Br; E = P or As; L = monobasic bidentate benzophenone ligand) have been synthesized from the reaction of ruthenium(III) precursors. viz. [RuX3(EPh3)(3)] (where X = Cl, E = P; X = Cl or Br, E = As) or [RuBr3(PPh3)(2)(CH3OH)] and substituted hydroxy benzophenones in a 1:1 molar ratio in benzene under reflux for 6 h. The hydroxy benzophenone ligands behave as monoanionic bidentate O,O donors and coordinate to ruthenium through the phenolate oxygen and ketonic oxygen atoms, generating a six-membered chelate ring. The compositions of the complexes have been established by analytical and spectral (FT-IR, UV-Vis, EPR) and X-ray crystallography methods. The single crystal structure of the complex [RuCl2(PPh3)(2)(L-1)] (1) has been determined by X-ray crystallography and indicates the presence of a distorted octahedral geometry in these complexes. The magnetic moment values of the complexes are in the range 1.75-1.89 mu(B), which reveals the presence of one unpaired electron in the metal ion. EPR spectra of liquid samples at liquid nitrogen temperature (LNT) show a rhombic distortion (g(x) not equal g(y) not equal g(z)) around the ruthenium ion. The complexes are redox active and display quasi-reversible oxidation and quasi-reversible reduction waves versus Ag/AgCl. (C) 2011 Elsevier Ltd. All rights reserved.
关键词Hydroxy benzophenone Ru(III) complex Crystal structure EPR Redox property
学科领域Chemistry; Crystallography
DOI10.1016/j.poly.2011.09.019
收录类别SCI
WOS记录号WOS:000300642900026
引用统计
被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/223888
专题多学科研究中心
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GB/T 7714
Raja, N,Ramesh, R,Liu, Y;刘宇. Paramagnetic ruthenium(III) complexes bearing O,O chelating ligands: Synthesis, spectra, molecular structure and electron transfer properties[J]. POLYHEDRON,2012,31(1):196-201.
APA Raja, N,Ramesh, R,&Liu, Y;刘宇.(2012).Paramagnetic ruthenium(III) complexes bearing O,O chelating ligands: Synthesis, spectra, molecular structure and electron transfer properties.POLYHEDRON,31(1),196-201.
MLA Raja, N,et al."Paramagnetic ruthenium(III) complexes bearing O,O chelating ligands: Synthesis, spectra, molecular structure and electron transfer properties".POLYHEDRON 31.1(2012):196-201.
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