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

被引：13

作者：

Amudha, P ^{[1
]}

Thirumavalavan, M ^{[1
]}

Kandaswamy, M ^{[1
]}

机构：

[1] Univ Madras, Sch Chem, Dept Inorgan Chem, Chennai 25, India

来源：

POLYHEDRON | 1999年 / 18卷 / 8-9期

关键词：

binucleating ligands; binuclear copper(II) complexes; electrochemical studies; magnetic studies;

D O I：

10.1016/S0277-5387(99)00014-5

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

New unsymmetrical binucleating ligands 4-bromo-2- [(4-methylpiperazin-1-yl)methyl]-6- [N-(3,5-dimethyl-2-hydroxy-benzyl)-N-methylaminomethyl]phenol (H2L1) and 4-bromo-2-[(4-methyl-piperazin-1-yl)methyl]-6-[N-( 3,5-dichloro2-hydroxybenzyl)-N-cyclo-hexylminomethyl] phenol (H2L2) and their copper(II) complexes [Cu2L1-2(X)]ClO4, (X=OH, Br, OAc) have been prepared. Spectral, electrochemical 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. (C) 1999 Elsevier Science Ireland Ltd. All rights reserved.

引用

页码：1363 / 1369

页数：7

共 34 条

[1]

Agarwal R. C., 1981, INORG CHEM, V20, P2794

[2]

[Anonymous], 1993, BIOINORGANIC CHEM CO

[3] DIRECT THEORETICAL ABINITIO CALCULATIONS IN EXCHANGE COUPLED COPPER (II) DIMERS - INFLUENCE OF STRUCTURAL AND CHEMICAL-PARAMETERS IN MODELED COPPER DIMERS [J].

ASTHEIMER, H ;

HAASE, W .

JOURNAL OF CHEMICAL PHYSICS, 1986, 85 (03) :1427-1432

[4] BINUCLEAR COPPER(II) COMPLEXES OF A NEW SULFUR-CONTAINING BINUCLEATING LIGAND - STRUCTURAL AND PHYSICOCHEMICAL PROPERTIES [J].

BENZEKRI, A ;

DUBOURDEAUX, P ;

LATOUR, JM ;

REY, P ;

LAUGIER, J .

JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS, 1991, (12) :3359-3365

[5]

Bleany B., 1952, Proc. R. Soc. London, VA214, P415

[6]

BRUKE WJ, 1965, J ORG CHEM, V30, P3423

[7]

BRUKE WJ, 1962, J ORG CHEM, V29, P909

[8]

CHUANG CL, 1995, INORG CHEM, V34, P2567

[9]

CRANE D, 1991, J CHEM SOC DA, P2979

[10] THE EVOLUTION OF BINUCLEATING LIGANDS [J].

FENTON, DE ;

CASELLATO, U ;

VIGATO, PA ;

VIDALI, M .

INORGANICA CHIMICA ACTA-ARTICLES, 1982, 62 (01) :57-66

← 1 2 3 4 →