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- W2001907528 abstract "Three novel oxamido-bridged heterobinuclear copper(II)–nickel(II) complexes derived from macrocylic oxamido compound with diamines and tetraazacyclam as blocking ligands were synthesized and characterized by IR, ESR and electronic spectra. Their formula is [Cu(L)Ni(en)2](ClO4)2·0.5C2H5OH·H2O (1), [Cu(L)Ni(tmd)2](ClO4)2·4H2O (2) and [Cu(L)Ni(rac-cth)](ClO4)2·CH3OH (3), where L=1,4,8,11-tetraazacyclotradecanne-2,3-dione, en=1,2-diaminoethande, tmd=1,3-diaminopropane and rac-cth is rac-5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane. The crystal structures of the three complexes have been determined. The structures consist of binuclear units in which the copper(II) ion is in a square-planar environment and linked to the nickel(II) ion via the exo-cis oxygen atoms of the oxamido macrocyclic ligand, with Cu⋯Ni separations of 5.311 (1), 5.420 (2) and 5.307 Å (3), respectively. The temperature dependence of the magnetic susceptibility for 1, 2 and 3 was analyzed by means of the Hamiltonian Ĥ=−2JŜNiŜCu, leading to J=−52.8, −45.7 and −56.9 cm−1 for 1, 2 and 3, respectively." @default.
- W2001907528 created "2016-06-24" @default.
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- W2001907528 date "2002-04-01" @default.
- W2001907528 modified "2023-09-24" @default.
- W2001907528 title "Heterobinuclear copper(II)–nickel(II) complexes of macrocyclic oxamide with diamines and tetraazacyclam as blocking ligands: synthesis, crystal structure and magnetic properties" @default.
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- W2001907528 doi "https://doi.org/10.1016/s0020-1693(02)00730-2" @default.
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