A novel tetra(μ3-phenoxo) bridged copper(II) Schiff base complex containing a Cu4O4 cubane core: Synthesis, structural aspects and magneto-structural correlations

A novel tetranuclear complex. [Cu4L4] center dot Na center dot ClO4 (1) has been prepared from an interesting multidentate Schiff base ligand H2L resulting from the 1:1 condensation of 3-methoxysalicylaldehyde with benzhydrazide. The prepared complex has been characterized by elemental analysis, FT-...

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Bibliographic Details
Published in:Polyhedron Vol. 28; no. 4; pp. 819 - 825
Main Authors: Chakraborty, Joy, Thakurta, Santarupa, Pilet, Guillaume, Luneau, Dominique, Mitra, Samiran
Format: Journal Article
Language:English
Published: OXFORD Elsevier 01.03.2009
Subjects:
Chemical Sciences
Chemistry
Chemistry, Inorganic & Nuclear
Cristallography
Crystallography
Material chemistry
Physical Sciences
Science & Technology
Cu4O4 cubane
BIS(SEMICARBAZONE)
CU(II)
CRYSTAL-STRUCTURES
ZINC(II)
Copper(II)
TETRANUCLEAR
THIOSEMICARBAZONE
Hydrazone ligand
MAGNETIC-PROPERTIES
LIGAND
PENTAGONAL-BIPYRAMIDAL COMPLEXES
CLUSTER
Tetra(mu-phenoxo) bridge
Magneto-structural correlation
Tetra(μ3-phenoxo) bridge
ISSN:0277-5387, 0277-5387
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Summary:A novel tetranuclear complex. [Cu4L4] center dot Na center dot ClO4 (1) has been prepared from an interesting multidentate Schiff base ligand H2L resulting from the 1:1 condensation of 3-methoxysalicylaldehyde with benzhydrazide. The prepared complex has been characterized by elemental analysis, FT-IR, UV-Vis spectroscopy, electrochemical studies and single crystal X-ray diffraction analysis. The Cu4O4 cubane core consists of four mu(3)-phenoxo-bridged copper(II) atoms giving an approximately cubic array of alternating copper(II) and oxygen atoms. Magneto-structural correlations have been drawn from cryomagnetic susceptibility measurements over a wide range of temperature (2-300 K) under 0.5 T magnetic field. The measurements reveal both ferromagnetic and anti ferromagnetic interactions in a 2J model [J(11) = +13.6(4) cm(-1) and J(12) = -34.9(4) cm(-1)] which in turn results in an overall anti ferro magnetic behaviour of the magnetic system. (C) 2009 Elsevier Ltd. All rights reserved.
ISSN:0277-5387
0277-5387
DOI:10.1016/j.poly.2008.12.018