Synthesis and Ferromagnetic Interaction in μ-Oxamido-Bridged Copper(II)-Oxovanadium(IV) Heterodinuclear Complexes

• Autorzy: Li Y. , Yan C. -W. , Guan H. -S.
• Języki publikacji: EN

Abstrakty

EN

Three new copper(II)-oxovanadium(IV) heterodinuclear complexes bridged by dianions of N,N_-oxamidobis(propionato)cuprate, [Cu(obp)] and end-capped with 1,10-phenanthroline (phen), 5-nitro-1,10-phenanthroline (NO2-phen) or 5-chloro-1,10-phenanthroline (Cl-phen), have been synthesized and characterized; namely [Cu(obp)VO(phen)] (1), [Cu(obp)VO(NO2-phen)] (2) and [Cu(obp)VO(Cl-phen)] (3). The three complexes have not yet been isolated in crystalline form suitable for X-ray structure analysis, but based on elemental analyses, IR and electronic spectra studies, magnetic moments at room-temperature and molar conductivity measurements, these complexes are proposed to have an extended oxamido-bridged structure consisting of planar copper(II) and square-pyramidal oxovanadium(IV) ions. The heterodinuclear complexes (1) and (2) were further characterized by variable-temperature magnetic susceptibility (4.2~300 K) measurements and the magnetic data have been also used to deduce the indicated heterodinuclear structure. The results derived from least-squares fit of the experimental data have confirmed that the operation of a ferromagnetic interaction between the adjacent oxovanadium(IV) and copper(II) ions through the oxamido-bridge within each molecule. Based on spin Hamiltonian, _ _ _ H = 2JS S 1 2 Ĺ , the exchange integral (J) was evaluated as J = +11.68 cm-1 for (1) and J = +10.27 cm-1 for (2). The influence of the symmetry of the magnetic orbitals on the nature of the magnetic interaction between the paramagnetic centers is also discussed.

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 2003
• Tom: Vol. 77 / nr 8
• Strony: 943--959
• Opis fizyczny: Bibliogr. 24 poz., rys.

Twórcy

autor

Li Y.

• Marine Drug & Food Institute, Ocean University of China, 5 Yushan Road, Qingdao, Shandong, 266003, P. R. China

autor

Yan C. -W.

• College of Marine Life Sciences, Ocean University of China, Qingdao, 266003, P. R. China

autor

Guan H. -S.

• Marine Drug & Food Institute, Ocean University of China, 5 Yushan Road, Qingdao, Shandong, 266003, P. R. China

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