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- W2040834498 abstract "Three new dinuclear copper(II) compounds: [Cu2(dpyam)2(μ1,1-N3)2(O2CH)2] (1), [Cu2(dpyam)2(μ1,1-N3)2(O2CCH3)2] (2) and [Cu2(dpyam)2(μ1,1-N3)2(O2CCH2CH3)2] (3) have been synthesized and characterized crystallographically and spectroscopically. Compounds 1, 2 and 3 consist of a dinuclear unit in which both Cu(II) ions are connected through two end-on azido bridges providing a distorted square pyramidal geometry with a CuN4O chromophore. The Cu⋯Cu separations are 3.195, 3.200 and 3.247 Å for compounds 1, 2 and 3, respectively. The magnetic properties have been measured in the range from 5 to 300 K and correlated with the molecular structures. All three compounds show a medium to weak ferromagnetic exchange interactions between the Cu(II) ions dominated by the bridging azido ligands, with a singlet-triplet splitting (J) of 63.3, 63.8 and 5.1 cm−1, for compounds 1, 2 and 3, respectively. A large zero-field splitting of about 0.4 cm−1 is observed in the EPR for compounds 1 and 2." @default.
- W2040834498 created "2016-06-24" @default.
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- W2040834498 date "2007-02-01" @default.
- W2040834498 modified "2023-09-23" @default.
- W2040834498 title "Three new dinuclear bis-μ-azido-bridged Cu(II) compounds with di-2-pyridylamine as a ligand: Syntheses, X-ray structure and magnetic measurements" @default.
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- W2040834498 doi "https://doi.org/10.1016/j.poly.2006.09.073" @default.
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