Synthesis,Crystal Structures and Magnetic Properties of Copper(II) Complexes with Nitronyl Nitroxide Radicals |
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| Authors: | Yu‐Fang Wang Li‐Ya Wang Prof. Dr. Lu‐Fang Ma |
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| Affiliation: | 1. Luoyang, Henan / P. R. China, Department of Chemistry, Luoyang Normal University;2. Qiangdao Shandong / P. R. China, New Materials Coordination Chemistry Laboratory, Qingdao University of Science and Technology |
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| Abstract: | Two new copper(II) compounds with imino nitroxide radicals [Cu(IM‐MeImz)2 · (SCN)] 0.5[Cu(SCN)4] ( 1 ) and [Cu(IM‐MeImz)2 · (SCN)]ClO4 · H2O ( 2 ) (IM‐meImz = 2‐(5‐methylimidazol‐4‐yl)‐4,4,5,5‐tetramethyl‐2‐imidazoline‐1‐oxyl) have been synthesized and characterized structurally and magnetically. X‐ray analysis demonstrates that complex 1 contains CuII ions in both square‐pyramidal and square planar coordination. There are complete charge separation into [Cu(IM‐MeImz)2(SCN)]+ cations and 0.5[Cu(SCN)4]? anions, in a 2:1 ratio. The complex 1 was connected as a one‐dimensional polymer by intermolecular interactions. In complex 2 , the coordination around the copper atom is distorted square pyramidal and the apical position is occupied by one nitrogen atom of SCN? anion. The 2‐D network structure was formed and arranged through intermolecular H‐bonds interactions. The complex 1 exhibits intramolecular weak ferromagnetic coupling between CuII ion and the radicals. |
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| Keywords: | Copper Nitronyl nitroxide Ferromagnetic interactions |
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