Magnetic coupling in EE and EO azido-bridged binuclear copper complexes: Synthesis, structure and magnetic studies

被引：31

作者：

Banerjee, Ishita ^{[1
]}

Marek, Jaromir ^{[2
]}

Herchel, Radovan ^{[3
]}

Ali, Mahammad ^{[1
]}

机构：

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

[2] Masaryk Univ, Fac Sci, Inst Expt Biol, Lab Funct Genom & Prote, CZ-62500 Brno, Czech Republic

[3] Palacky Univ, Fac Sci, Dept Inorgan Chem, CZ-77146 Olomouc, Czech Republic

来源：

POLYHEDRON | 2010年 / 29卷 / 04期

关键词：

EE and EO bridging; Synthesis; Crystal structures; Ferro and antiferromagnetic coupling; TRANSITION-METAL-COMPLEXES; DENSITY-FUNCTIONAL THEORY; CYTOCHROME-C-OXIDASE; CRYSTAL-STRUCTURES; MOLECULAR-STRUCTURES; COORDINATION POLYMERS; CU(II) COMPLEXES; LIGANDS; COMPOUND; BEHAVIOR;

D O I：

10.1016/j.poly.2009.12.023

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Four azide bridged dinuclear copper(II) complexes, [Cu-2(L-X)(2)(N-3)(2)](ClO4)(2), with L-X = substituted N,N-bis[(3,5-dimethylpyrazole-1-y1)-methyl]benzylamine, [X = H (1), OMe (2), Me (3) and Cl (4)] have been synthesized, out of which complexes 1 and 2 have been characterized structurally. In Complex 1 the two bridging azide ligands have connected the two metal centers in an end-on (EO) fashion with aSP (asymmetric Square Pyramidal) geometry and showed an weak antiferromagnetic interaction (J = -3.34 cm(-1)). On the contrary, in complex 2, the two metal centers have been connected in end-toend (EE) fashion exhibiting moderately strong ferromagnetic interaction (J = +19.7 cm(-1)). Cyclic voltammetric studies performed on all the four complexes show a reasonably good correlations when E-1/2 for (CuCuII)-Cu-II -> (CuCuIII)-Cu-II and (CuCuIII)-Cu-II -> (CuCuIII)-Cu-II oxidations are plotted against sigma (substituent constants) with p = -0.182 (R-2 = 0.92) and 0.684 (R-2 = 0.99) respectively. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：1201 / 1208

页数：8

共 57 条

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