Synthesis and magnetic Studies of mi-Iodanilato-Bridged Iron(III)-Iron(III) Binuclear Complexes

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

Abstrakty

EN

Four new _-iodanilato-bridged binuclear iron(III) complexes have been prepared and identified: [Fe2(IA)L4](ClO4)4, where IA represents the dianion of iodanilic acid and L denotes 2,2_-bipyridine (bpy); 1,10-phenanthroline (phen), 5-chloro-1,10-phenanthroline (Cl-phen) or 5-nitro-1,10-phenanthroline (NO2-phen). Based on elemental analyses, molar conductivity, magnetic moment of room-temperature measurements, IR and electronic spectra studies, these complexes are proposed to have extended IA-bridged structures consisting of two iron(III) ions, each in a distorted octahedral environment. The complexes [Fe2(IA)(bpy)4](ClO4)4 (1) and [Fe2(IA)(phen)4](ClO4)4 (2) were further characterized by variable temperature (4.2~300 K) magnetic susceptibility measurements and the observed data were successfully simulated by the equation based on the spin Hamiltonian operator,_ _ _ H = 2JS S 1 2 Ĺ , giving the exchange parameter J = -6.9 cm-1 for (1) and J = -9.8 cm-1 for (2). These results are commensurate with antiferromagnetic spin-exchange interaction between the two iron(III) ions within each molecule. The influence of halogen substituents in the bridging ligand on magnetic interactions between the metal ions of this kind of complexes is also discussed.

Słowa kluczowe

EN

iodanilato-bridged; iron(III)-iron(III); binuclear complexes; magnetism; synthesis

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 2003
• Tom: Vol. 77 / nr 8
• Strony: 935--942
• Opis fizyczny: Bibliogr. 28 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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