Synthesis, Spectral and Magnetic Characterisation of Copper(II) Dinuclear and Polynuclear Complexes with a Macrocyclic 34-Membered Hexaamine |
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| Authors: | Marek Pietraszkiewicz Oksana Pietraszkiewicz Robert Saf Klaus Hummel Anna Skorupa Jerzy Mroziński |
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| Institution: | (1) Institute of Physical Chemistry, Polish Academy of Sciences, 01-224 Warsaw, Kasprzaka 44/52, Poland;(2) Technischen Universität Graz, A-8010 Graz, Austria;(3) Department of Chemistry, University of Wroc aw, 14, F. Joliot-Curie, 50-383 Wrocaw, Poland |
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| Abstract: | 34-Membered macrocyclic hexaamine containing two independent N3 donor sets forms homodinuclear copper(II) complexes. Displacements of anions within the copper(II) chloride complexes occurred easily upon addition of different anions to the CuCl2 complex. All new complexes were characterised by elemental analysis, IR, UV/VIS spectroscopy, and magnetic susceptibility measurements. Tetranuclear complexes indicate relation  Cu
–1 vs. T in agreement with the Curie–Weiss law. A behaviour anomalous in relation to the phthalate complexes is shown by the Cu4L2Cl4(ox)2] complex in which an antiferromagnetic coupling (J = - 53.9 cm–1) between the Cu2+ ions through the C2O
4
2–
bridge is observed. |
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| Keywords: | transition metal complexes macrocycles polyamines magnetism |
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