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Abstrakty
Four new copper(II)-manganese(II) heterobinuclear complexes bridged by N,N - bis[2-(dimethylamino)ethyl)]oxamido dianion (dmoxae) and end-capped with 2,2 -bipyridine (bpy); 4,4 -dimethyl-2,2 -bipyridine (Me2-bpy); 5-chloro-1,10-phenanthroline (Cl-phen) or 5-bromo-1,10-phenanthroline (Br-phen), respectively, namely, [Cu(dmoxae)MnL2](ClO4)2 (L = bpy, Me2-bpy, Cl-phen, Br-phen), have been synthesized and characterized by elemental analyses, IR and electronic spectra studies and molar conductivity measurements. The electronic reflectance spectrum indicates the presence of exchange-coupling interaction between bridging copper(II) and manganese(II) ions. The cryomagnetic measurements (4.2-300 K) of [Cu(dmoxae)Mn(bpy)2](ClO4)2 complex demonstrated the operation of an antiferromagnetic interaction between the adjacent manganese(II) and copper(II) ions through the oxamido-bridge within the complex. On the basis of spin Hamiltonian, H = 2JS S 1 2 , the magnetic analysis was carried out for the complex and the spin-coupling constant (J) was evaluated as -36.9 cm-1. The influence of methyl substituents in amine groups of the bridging ligand on magnetic interactions between the metal ions of this kind of complexes is also discussed.
Wydawca
Czasopismo
Rocznik
Tom
Strony
223--230
Opis fizyczny
Bibliogr. 19 poz., rys.
Twórcy
autor
- Department of Chemistry, Qufu Normal University, Qufu, Shandong, 273165, P. R. China
autor
- Department of Biology, Qufu Normal University, Quju, Shandong, 273165, P. R. China
autor
- Department of Chemistry, Qufu Normal University, Qufu, Shandong, 273165, P. R. China
Bibliografia
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Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BUJ1-0016-0074