Abstract
AbstractX‐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 P21/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.
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