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    National Tsing Hua University Institutional Repository > 歷任校長 > 劉兆玄 (1987-1993) > 期刊論文 >  Crystal and Molecular Structure of (1,1,4,4-Tetrafluoro-2-tert-buty-1,4-disilabut-2-ene)molybdenum (II) Pentacarbonyl


    Please use this identifier to cite or link to this item: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/81074


    Title: Crystal and Molecular Structure of (1,1,4,4-Tetrafluoro-2-tert-buty-1,4-disilabut-2-ene)molybdenum (II) Pentacarbonyl
    Authors: Sheu, T. H.;Chi, Y.;Liu, C. S.
    教師: 劉兆玄
    Date: 1981
    Publisher: American Chemical Society
    Relation: INORGANIC CHEMISTRY, American Chemical Society, Volume 20, Issue 1, 1981, Pages 199-204
    Keywords: Crystal
    Molecular
    molybdenum
    Pentacarbonyl
    Abstract: (1,1,4,4-Tetrafluoro-2-tert-butyl-l,4-disilabut-2-ene)molybdenum(IpIe)n tacarbonyl has been prepared photochemically by reaction of 3-tert-butyl- 1,1,2,2-tetrafluoro-l,2-disilacyclobutewniet h molybdenum hexacarbonyl in pentane. The crystal structure was determined by X-ray diffraction. The crystal is triclinic, of space group Pi, with Z = 2; a = 12.710 (3) A, b = 10.236 (2) A, c = 7.242 (5) A, CY = 86.53 (3)", 6 = 93.78 (3)O, y = 70.65 (2)O, and Dmld = 1.568 g ~ m - ~Th.e structure was solved by heavy-atom methods and refined by full-matrix least squares with the use of anisotropic temperature factors to an R value of 0.059 for 2897 independent reflections. The central molybdenum atom is seven-coordinated with a pentagonal-bipyramidal environment. The pentagonal base contains the disilabutene ligand and three carbonyl groups. The average bonding distances are 2.041 (13) A for Mo-C and 2.605 (3) A for Mo-Si. The five-membered molybdodisilabutene ring is rather strained with endocyclic silicon and carbon valence angles substantially reater and smaller than their tetrahedral and trigonal ideal ones, respectively. The transannular Si-Si distance is 2.861 1, which is substantially shorter than the sum of van der Waals radii, suggesting there might be direct siliconsilicon cross-ring interaction.
    Relation Link: http://pubs.acs.org/
    URI: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/81074
    Appears in Collections:[劉兆玄 (1987-1993)] 期刊論文
    [化學系] 期刊論文

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