Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/17366
Title: Structural and magnetic properties of O-bridged tetranuclear and binuclear Cu(II) complexes
Authors: Xie, Y
Jiang, H
Chan, ASC
Liu, Q
Xu, X
Du, C
Zhu, Y
Keywords: Crystal structures
Cu(II) complexes
Magnetic properties
O-bridge
Issue Date: 2002
Publisher: Elsevier
Source: Inorganica chimica acta, 2002, v. 333, p. 138-143 How to cite?
Journal: Inorganica chimica acta 
Abstract: Two copper(II) complexes [Cu 4(L 1) 4] (1) and [Cu 2(phen) 2(HL 2) 2] (ClO 4) 2 (2) have been synthesized from two potentially tridentate ligands N-(2-hydroxybenzyl) propanolamine (H 2L 1) and N-(2-hydroxybenzyl) ethanolamine (H 2L 2). X-ray analyses revealed that 1 contains a Cu 4O 4 cubane core, with each two Cu(II) atoms bridged by a pair of alkoxides; 2 has a bis(μ 2-phenoxo)-bridged dicopper(II) structure. Variable temperature magnetic measurements of 1 have revealed that the correlation between 2J and the bridge angles φ for 1 shows a very strong antiferromagnetic tendency, i.e. the ferromagnetic and antiferromagnetic interactions cross at the φ of 94.5°. The relatively weak antiferromagnetic interactions (2J=-226.8 cm -1) with respect to the bridge angles (φ=100.4°) for 2 have been ascribed to the pyramidal distortions at the phenoxide oxygen atoms in addition to the unfavorable overlaps of the magnetic orbitals for the highly distorted copper coordination polyhedra.
URI: http://hdl.handle.net/10397/17366
ISSN: 0020-1693
EISSN: 1873-3255
DOI: 10.1016/S0020-1693(02)00769-7
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