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    Title: Mononuclear Iron(Ⅲ) and Manganese(Ⅲ) Complexes with Substituted Salicylaldimine Ligands: Structure, Magnetic Properties, and Catalytic Activity of Olefins-Epoxidation
    Authors: 鄭勝權;Cheng, Sheng-chuan;張振偉;Chang, Cheng-wei;魏和祥;Wei, Ho-hsiang;李錦祥;Lee, Gene-hsiang;王瑜;Wang, Yu
    Contributors: 淡江大學化學學系
    Keywords: Manganese complex;Iron complex;Magnetic properties;Epoxidation of olefins
    Date: 2003-02
    Issue Date: 2013-07-29 13:43:14 (UTC+8)
    Publisher: 臺北市:中國化學學會
    Abstract: Two mononuclear manganese(III) and iron(III) complexes with substituted salicylaldimine ligands, [MnL(H2O)2]Cl·H2O (1) and [FeL(H2O)(Cl)]CH3CN (2) [H2L = N,N¢-(1,1-cyclohexane)bis(3-methoxysalicylaldimine)] were prepared and characterized. The X-ray crystal structure shows that 1 and 2 centers are six-coordinate with distorted octahedral geometry. In 1, the hydrogen bonding of water molecules form a quasi one-dimensional chain structure. The temperature dependence of magnetic susceptibility measurements for complexes of 1 and 2 was analyzed in terms of the zero-field splitting (D) spin-Hamiltonian formula with D = 2.0 cm-1 for 1 and J = 7.5 cm-1, and D = 0.01 cm-1 for 2, respectively. The complexes of 1 and 2 activate the epoxidation of cis-stilbene or a-methylstyrene by NaOCl. With 1 the epoxides were produced in 75% yield with cis:trans = 12:88 from cis-stilbene and 82% from a-methylstyrene, and with 2 the epoxides were produced in 43% with cis:trans = 30:70 from cis-stilbene and 71% from a-methylstyrene.
    Relation: Journal of the Chinese Chemical Society=中國化學會會誌 50(1), pp.41-46
    DOI: 10.1002/jccs.200300005
    Appears in Collections:[Graduate Institute & Department of Chemistry] Journal Article

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