Magnetic Exchange Interactions in Tetranuclear Copper(II) Complexes
Effect of ligand electronegativity
Magnetic susceptibility measurements are reported for a series of tetranuclear copper (II) complexes [Cu 4OX 6L 4] (X = Br or Cl; L = Cl, Br, C 5H 5N, C 5H 5NO, tetramethylurea, or dimethyl sulphoxide). These data and literature data on other tetranuclear complexes describe a range of magnetic behaviour, varying from strong intramolecular antiferromagnetic interaction, through weak antiferromagnetic interaction, to apparent ferromagnetism. Intermolecular interactions are found to be negligible. The results are used to evaluate current theoretical models for such systems, and are consistent with the existence of a significant symmetric component in the pairwise exchange Hamiltonian.
H. Wong et al., "Magnetic Exchange Interactions in Tetranuclear Copper(II) Complexes," Journal of the Chemical Society, Dalton Transactions, Royal Society of Chemistry, Jan 1980.
The definitive version is available at http://dx.doi.org/10.1039/DT9800000786
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© 1980 Royal Society of Chemistry, All rights reserved.