Structure and magnetic properties of a tetranuclear Cu4O4 open-cubane in [Cu(L)]4•4H2O with L2- = (E)-N′-(2-oxy-3-methoxybenzylidene)benzohydrazide

被引：52

作者：

Monfared, Hassan Hosseini ^{[1
]}

Sanchiz, Joaquin ^{[2
]}

Kalantari, Zahra ^{[1
]}

Janiak, Christoph ^{[3
]}

机构：

[1] Zanjan Univ, Dept Chem, Fac Sci, Zanjan 45195313, Iran

[2] Univ La Laguna, Dept Quim Inorgan, E-38206 Tenerife, Spain

[3] Univ Freiburg, Inst Anorgan & Analyt Chem, D-79104 Freiburg, Germany

来源：

INORGANICA CHIMICA ACTA | 2009年 / 362卷 / 10期

关键词：

Tetranuclear complex; Copper(II); Benzoylhydrazone; Schiff base; Open-cubane; Magnetism; TETRAMERIC COPPER(II) COMPLEX; FERROMAGNETIC GROUND-STATE; X-RAY STRUCTURES; ASYMMETRIC UNIT; COORDINATION POLYMERS; MOLECULAR-STRUCTURE; MULTIPLE MOLECULES; CRYSTAL-STRUCTURES; METAL-COMPLEXES; HYDROGEN-BONDS;

D O I：

10.1016/j.ica.2009.04.042

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The in-situ formed hydrazone Schiff base ligand (E)-N'-(2-oxy-3-methoxybenzylidene) benzohydrazide (L-2) reacts with copper(II) acetate to a tetranuclear open cubane [Cu(L)](4) complex which crystallizes as two symmetry-independent (Z' = 2) S-4-symmetrical molecules in different twofold special positions with a homodromic water tetramer. The two independent (A and B) open- or pseudo-cubanes with Cu4O4 cores of 4 + 2 class (Ruiz classi. cation) each have three different magnetic exchange pathways leading to an overall antiferromagnetic coupling with J(1B) = J(2B) = -17.2 cm (1) , J(1A) = -36.7 cm (1), J(2A) = -159 cm (1), J(3A) = J(3B) = 33.5 cm (1), g = 2.40 and rho = 0.0687. The magnetic properties have been analysed using the H = -Sigma(i,j)J(ij)(SiSj) spin Hamiltonian. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：3791 / 3795

页数：5

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