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    National Tsing Hua University Institutional Repository > 歷任校長 > 劉兆玄 (1987-1993) > 期刊論文 >  A Study of Unsaturated Pyrazolate-Bridged Diruthenium Carbonyl Complexes


    Please use this identifier to cite or link to this item: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/81119


    Title: A Study of Unsaturated Pyrazolate-Bridged Diruthenium Carbonyl Complexes
    Authors: Song, Y.-H.;Chi, Y.;Chen, Y.-L.;Liu, C.-S.;Ching, W.-L.;Carty, A. J.;Peng, S.-M.;Lee, G.-H.
    教師: 劉兆玄
    Date: 2002
    Publisher: American Chemical Society
    Relation: ORGANOMETALLICS, American Chemical Society, Volume 21, Issue 22, OCT 28 2002, Pages 4735-4742
    Keywords: BINUCLEAR RUTHENIUM(I) COMPLEXES
    X-RAY STRUCTURE
    MOLECULAR-STRUCTURES
    CRYSTAL-STRUCTURE
    REACTIVITY PATTERNS
    DITHIOETHER LIGANDS
    METAL CHAIN
    RU-RU
    CARBOXYLATES
    CLUSTERS
    Abstract: The reaction of Ru-3(CO)(12) with approximately 3 equiv of 3,5-di-tert-butylpyrazole, (dbpz)H, in hexane at 170 degreesC in a stainless steel autoclave afforded the unsaturated, pyrazolate-bridged diruthenium. complex [Ru-2(CO)(5)(dbpz)(2)] (2). The spectroscopic and structural analysis indicated that this compound contains a vacant coordination site at one axial position trans to the Ru-Ru linkage. This compound reacted with CO at room temperature to give the saturated complex [Ru-2(CO)(6)(dbpz)(2)] (1b); its structure is analogous to that of the previously determined complexes [Ru-2(CO)(6)(pz)(2)], pz = pyrazolate and 3,5-dimethyl pyrazolate, except that the equatorial CO ligands show a skew arrangement, an indication of steric constraints within the coordination sphere. Treatment of 2 with benzyl isocyanide or with pyridine in toluene leads to the formation of substitution products [Ru-2(CO)(4)(L)(dbpz)(2)], L = CNCH2Ph and pyridine, in which the incoming donor ligand occupies an equatorial position at the saturated Ru center. The structural significance of this pyrazolate-bridged diruthenium complex 2 is discussed.
    Relation Link: http://pubs.acs.org/
    URI: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/81119
    Appears in Collections:[劉兆玄 (1987-1993)] 期刊論文
    [化學系] 期刊論文

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