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Crystal Structure and Magnetic Properties of Pyridyl‐Substituted Nitronyl Nitroxides
Author(s) -
Lee ChinJhan,
Wei HoHsiang,
Lee GeneHsiang,
Wang Yu
Publication year - 1998
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.199800055
Subject(s) - chemistry , monoclinic crystal system , intermolecular force , antiferromagnetism , crystal structure , crystallography , oxide , crystal (programming language) , molecule , radical , nitroxide mediated radical polymerization , nitrone , stereochemistry , organic chemistry , catalysis , polymer , monomer , physics , computer science , programming language , condensed matter physics , radical polymerization , cycloaddition
X‐ray crystal structure and cryomagnetic properties of three organic radicals, 2‐(2‐pyridyl)‐4, 4,5,5‐tetramethyl‐4,5‐dihydro‐1‐ H ‐imidazol‐1‐oxyl‐3‐N‐oxide(NIT‐oPy) 1, 2‐(3‐pyridyl)‐4,4,5,5‐tetramethyl‐4,5‐dihydro‐l‐ H ‐imidazol‐1‐oxyl‐3‐N‐oxide(NIT‐mPy) 2 and 2‐(6‐methyl‐2‐pyridyl)‐4,4,5,5‐tetramethyl‐4, 5‐dihydro‐1‐ H ‐imidazol‐1‐oxyl‐3‐N‐oxide(NIT‐6M‐oPy) 3 were investigated. The crystal structures of compounds 1‐3 show the same feature of a P 2 1 /c space group of a monoclinic system. Two crystallographically independent molecules were found in the crystals of compounds 1‐3. The temperature dependence of magnetic susceptibility of compounds 1‐3 revealed an intermolecular antiferromagnetic exchange interaction.