Ferromagnetic exchange coupling in a new bis(μ-chloro)-bridged copper(II) Schiff base complex: Synthesis, structure, magnetic properties and catalytic oxidation of cycloalkanes

被引：94

作者：

Thakurta, Santarupa ^{[1
]}

Roy, Partha ^{[2
]}

Rosair, Georgina ^{[3
]}

Gomez-Garcia, Carlos J. ^{[4
]}

Garribba, Eugenio ^{[5
]}

Mitra, Samiran ^{[1
]}

机构：

[1] Jadavpur Univ, Dept Chem, Kolkata 700032, India

[2] Indian Assoc Cultivat Sci, Dept Inorgan Chem, Kolkata 700032, India

[3] Heriot Watt Univ, Dept Chem, Sch Engn & Phys Sci, Edinburgh EH14 4AS, Midlothian, Scotland

[4] Univ Valencia, ICMol, Paterna 46980, Spain

[5] Univ Sassari, Dept Chem, I-07100 Sassari, Italy

来源：

POLYHEDRON | 2009年 / 28卷 / 04期

关键词：

Schiff base; Bis(mu-chloro)-bridge; Ferromagnetic; Catalytic activity; CHLORO-BRIDGED DIMER; CRYSTAL-STRUCTURES; PEROXIDATIVE OXIDATION; ELECTRONIC-PROPERTIES; MOLECULAR-STRUCTURE; DONOR GROUP(S); TRINUCLEAR; LIGANDS; STEREOCHEMISTRY; TETRANUCLEAR;

D O I：

10.1016/j.poly.2008.12.016

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A new (mu-chloro)-bridged complex [Cu(HL)Cl](2) center dot H2O (1) with the Schiff base ligand H2L, [2-((E)-(2-hydroxyethylimino)methyl)-4-bromophenol], has been synthesized and characterized by elemental analysis, IR, UV-Vis and EPR spectroscopic studies. X-ray diffraction studies show that 1 is a binuclear Cu-II complex with a pair of chlorine atoms bridging the copper atoms in a central Cu2Cl2 core. Each copper atom in I adopts a distorted square-pyramidal geometry with the imine nitrogen atom, alkoxy and phenoxy oxygen atoms from the Schiff base ligand and a bridging chlorine atom constructing the basal plane, while the apical position of the pyramid is occupied by the other bridging chlorine atom. Variable temperature susceptibility measurements show that complex I presents the highest ferromagnetic coupling [J = +43.2(5) cm(-1)] reported till date in any doubly chloro-bridged Cu-II dimer, and a weak interdimer antiferromagnetic coupling [J' = -0.276(8) cm(-1)]. The complex also exhibits high catalytic activity towards the oxidation of hydrocarbons using H2O2 as terminal oxidant. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：695 / 702

页数：8

共 57 条

[1] SYNTHESIS, STRUCTURE, AND SPECTROSCOPIC PROPERTIES OF COPPER(II) COMPOUNDS CONTAINING NITROGEN SULFUR DONOR LIGANDS - THE CRYSTAL AND MOLECULAR-STRUCTURE OF AQUA[1,7-BIS(N-METHYLBENZIMIDAZOL-2'-YL)-2,6-DITHIAHEPTANE]COPPER(II) PERCHLORATE [J].