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Title: Three novel copper-radical complexes: Syntheses, crystal structures, and magnetic properties
Authors: Chen, X.-D.
Rong, R.
Wang, Y.
Zhu, L.-L.
Zhao, Q.-H.
Ang, S.G. 
Sun, B.-W.
Keywords: Copper
Magnetic properties
Structure elucidation
Issue Date: Aug-2010
Citation: Chen, X.-D., Rong, R., Wang, Y., Zhu, L.-L., Zhao, Q.-H., Ang, S.G., Sun, B.-W. (2010-08). Three novel copper-radical complexes: Syntheses, crystal structures, and magnetic properties. European Journal of Inorganic Chemistry (22) : 3506-3512. ScholarBank@NUS Repository.
Abstract: Three novel copper-radical complexes [Cu(PhCOO)2-(NITpPy) 2(H2O)2] (1), [Cu2(Me 3CCOO)4(NITpPy)2] (2), and [{Cu 2(Me3CCOO)4(NITpPy)}n] (3) [NITpPy = 4,4,5,5-tetramethyl-2-(4-pyridyl)-2-imidazoline-1-oxyl 3-oxide] were synthesized and characterized structurally as well as magnetically. It is noteworthy that the syntheses of complexes 2 and 3 are similar except for the temperature of the reaction between Cu(Me3CCOO)2· 2H2O and the NITpPy radical ligand. Our magnetic study of complexes 1 and 2 reveals that the antiferromagnetic interactions occur with a J value around-10 cm-1 between copper(II) and radicals when radicals use the pyridine nitrogen atom connected to the copper(II) ion. Yet the best-fit parameters of complex 3 reveal that significant ferromagnetic interactions (J2 = 20.5 cm-1) take place in the copper radical when radicals coordinate the copper(II) ion with nitroxide directly. © 2010 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.
Source Title: European Journal of Inorganic Chemistry
ISSN: 14341948
DOI: 10.1002/ejic.201000005
Appears in Collections:Staff Publications

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