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- W2088207635 abstract "Five new copper(II)-iron(II) heterodinuclear complexes bridged by the dianion of N,N'-bis[3-(dimethylamino)propyl]oxamido (dmoxpn) and end-capped with 2,2'-bipyridine (bpy); 1,10-phenanthroline (phen); 5-nitro-1,10-phenanthroline (NO 2 -Phen); 5-chloro-1,10-phenanthroline (Cl-phen) or 5-bromo-1,10-phenanthroline (Br-phen); namely [Cu(dmoxpn)FeL 2 ](ClO 4 ) 2 (L = bpy, phen, NO 2 -phen, Cl-phen, Br-phen), have been synthesized and characterized. Based on elemental analyses, magnetic moments (at room temperature), molar conductivity measurements, and spectroscopic studies, extended oxamido-bridged structures consisting of a copper(II) ion and an iron(II) ion, which have a square-planar environment and an octahedral environment, respectively, are proposed for these complexes. The [Cu(dmoxpn)Fe(bpy) 2 ](ClO 4 ) 2 (1) and [Cu(dmoxpn)Fe(phen) 2 ](ClO 4 ) 2 (2) complexes have been further characterized by variable temperature magnetic susceptibility (4.2∼300 K) and the observed data were least-squares fitted to the susceptibility equation derived from the spin Hamiltonian including single-ion zero-field interaction for the iron(II)ion, H = -2J 1 , S 2 - DS 2 Z 1 , giving the exchange integrals J =-15.9 cm - 1 for (1) and J =-17.5 cm - 1 for(2). These resultsindicated that the spin coupling between the adjacent copper(II) and iron(II) ions through oxamido-bridge in both complexes (1) and (2) is antiferromagnetic. The influence of methyl (-CH 3 ) substituents in the bridging ligand on magnetic interactions between the metal ions of this kind of complexes is also discussed." @default.
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- W2088207635 date "2005-01-01" @default.
- W2088207635 modified "2023-09-28" @default.
- W2088207635 title "Synthesis and Magnetic Analysis of mi Oxamido-Bridged Cu(II)-Fe(II) Heterodinuclear Complexes" @default.
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