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    Title: Strong Antiferromagnetic Exchange Interactions in Cobalt(II) Complexes with 2-Pyridyl Substituted Nitronyl Nitroxide Ligand
    Authors: 黃乾峰;Huang, Chian-feng;魏和祥;Wei, Ho-hsiang
    Contributors: 淡江大學化學學系
    Keywords: Molecular magnetism;Cobalt(Ⅱ) complexes of nitronyl nitroxides;Crystal structure;Magnetic property;分子磁性;鈷錯合物;硝基氧化物;晶體結構;磁性
    Date: 1997-08-01
    Issue Date: 2013-07-29 13:43:47 (UTC+8)
    Publisher: 臺北市:中國化學學會
    Abstract: Three new complexes, [ Co(hfac)/sub 2/(NIToPy) ] (1), [ CoCl/sub 2/(NIToPy)/sub 2/ ] (2), and [ Co(NIToPy)/sub 3/] (ClO/sub 4/)/sub 2/ (3), with NIToPy=2-(2-Pyridyl)- 4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazolyl-oxy-3-oxide, and hfac= hexafluoroacetylacetonate, have been synthesized. The compound 3 crystallized in the monoclinic space group P2/sub 1/, with two molecules in a unit cell of dimensions a=10.565(4).ANG., b=14.714(9).ANG., c=14.596(7).ANG., and.beta.=107.10(4).degree.. The temperature-dependent magnetic susceptibility measurements (4.2K-300K) for the complexes demonstrated strong antiferromagnetic exchange interaction between cobalt(II) ion and NIToPy radical spins with J=-140.1cm/sup -1/ for 1, J=-94.2cm/sup -1/ for 2, and J=-161.8cm/sup -1/ for 3, respectively. The magneto-structural correlation in these complexes has been discussed.
    Relation: Journal of the Chinese Chemical Society=中國化學會會誌 44(4), pp.439-443
    DOI: 10.1002/jccs.199700067
    Appears in Collections:[化學學系暨研究所] 期刊論文

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