Synthesis and Magnetic Properties of mi-Oxalato-Bridged Cu(II)-Fe(III)-Cu(II) Heterotrinuclear Complexes

• Autorzy: Wang H. D. , Li Y. -T. , Yan C. -W. , Zeng X.-C.
• Języki publikacji: EN

Abstrakty

EN

Three new _-oxalato-bridged copper(II)-iron(III)-copper(II) heterotrinuclear complexes described by the overall formula [Cu2Fe(ox)3L2]ClO4, where ox represents the oxalato dianions and L stands for 5-phenyl-1,10-phenanthroline (Ph-phen), 4,7-diphenyl- 1,10-phenanthroline (Ph2-phen) or 5-chloro-1,10-phenanthroline (Cl-phen), have been synthesized and characterized by elemental analyses, molar conductivity and magnetic moment (at room-temperature) measurements, IR and electronic spectral studies. It is proposed that these complexes have extended ox-bridged structures, consisting of two copper(II) and an iron(III) ions, in which the central iron(III) ion has an octahedral environment and the end capped two copper(II) ions have a square-planar environment. The variable-temperature susceptibilities of [Cu2Fe(ox)3(Ph-phen)2]ClO4 complex were measured and studied in the 4.2~300 K range. The least-squares fit of the experimental susceptibility based on the spin Hamiltonian operator, _ _ _ H = JS S 1 2 _ _ 2 , yielded J = -9.89 cm-1. The magnetic coupling parameter is consistent with an antiferromagnetic exchange interaction between the copper(II) and iron(III) ions through the oxalato-bridge in the complex.

Słowa kluczowe

EN

oxalato-bridge; Cu(II)-Fe(III)-Cu(II); heterotrinuclear complexes; magnetic properties

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 2002
• Tom: Vol. 76 / nr 5
• Strony: 637--644
• Opis fizyczny: Bibliogr. 22 poz., rys.

Twórcy

autor

Wang H. D.

• Department of Chemistry, Sichuan University, Chengdu, Sichuan, 610064, P. R. China

autor

Li Y. -T.

• Department of Chemistry, Qufu Normal University, Qufu, Shandong, 273165, P. R. China

autor

Yan C. -W.

• Department of Chemistry, Qufu Normal University, Qufu, Shandong, 273165, P. R. China

autor

Zeng X.-C.

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