Synthesis and Magnetic Properties of Heterobinuclear Copper(II)-Manganese(II) Complexes with N, N'-Bis[2-(dimethylamino)ethyl]oxamide as Ligand

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

Abstrakty

EN

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.

Słowa kluczowe

EN

oxamido-bridge; copper(I)-manganese(II); heterobinuclear complexes; magnetic properties; synthesis

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 2001
• Tom: Vol. 75, nr 2
• Strony: 223--230
• Opis fizyczny: Bibliogr. 19 poz., rys.

Twórcy

autor

Li Y.

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

autor

Yan C. -W.

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

autor

Miao S. -H.

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

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