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Syntheses, Crystal Structures, and Magnetic Properties of Two Mononuclear Nickel‐Nitronyl Nitroxide Radical Compounds
Author(s) -
Zhai Bin,
Li ZhongYi,
Zhang FuQiang,
Li SuZhi,
Zhang FuLi,
Zhang Chi,
Zhang XiangFei,
Cao GuangXiu,
Ma Yue
Publication year - 2016
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201600002
Subject(s) - nickel , nitroxide mediated radical polymerization , chemistry , antiferromagnetism , crystallography , ligand (biochemistry) , crystal structure , radical , octahedron , ion , magnetic susceptibility , stereochemistry , organic chemistry , monomer , polymer , receptor , biochemistry , physics , radical polymerization , condensed matter physics
Two nickel(II) complexes were synthesized and structurally as well as magnetically characterized by using two positional isomeric nitronyl nitroxide radical ligands and H 3 cda as co‐ligand: [Ni(NIToPy)(cda)]H 2 O · CH 3 OH ( 1 ) and [Ni(IM4Py) 2 (cda)H 2 O] ( 2 ) [NIToPy = 2‐(3′‐pyridinyl)‐4,4,5,5‐tetramethyl‐4,5‐dihydro‐1H‐imidazolyl‐1‐oxyl‐3‐oxide; IM4Py = 2‐(4′‐pyridinyl)‐4,4,5,5‐tetramethylimidazoline‐l‐oxyl; H 3 cda = 4‐hydroxypyridine‐2,6‐dicarboxylic acid]. Single‐crystal structures analyses show that both complexes have similar mononuclear structures, in which the central Ni II ions are hexacoordinated with a distorted octahedral arrangement. The magnetic properties of 1 and 2 were studied, and antiferromagnetic interactions between Ni II ion and radicals are observed.