Chia Nan University of Pharmacy & Science Institutional Repository:Item 310902800/24398
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    標題: Photochemical reaction of dirhenium decacarbonyl with triphenylphosphine
    作者: S.W.LEE
    L.F.WANG
    C.P.CHENG
    貢獻者: Department of Chemistry,National Tsing Hua University
    日期: 1987
    上傳時間: 2011-10-24 14:19:41 (UTC+8)
    摘要: The CO substitution reaction of Re2(CO)l0 by triphenylphosphine was investigated photochemically under vacuum. In contrast to the previous studies, three sterically crowded, triply substituted dirhenium complexes, i.e. 1-axial-2',4'-diequa-torial-Re2 (CO)7 (PPh3)3 1-axial-2,2'-diequatorial-Re2 (CO)7 (PPh3 )3 and 2,2'4'-tri-equatorial-Re2(CO)7(PPh3)3 were isolated and characterized. A fourth compound,which was tentatively assigned as Re2(CO)6(PPh3)4, was also isolated. Contrary to the Mn system, the [Re(CO)n(PPh3)5-n] radical, which is believed to be the intermediate of the photochemical substitution reaction, could not be detected by EPR spectroscopy. The subtle differences in substitution chemistry between rhenium carbonyl and manganese carbonyl complexes are the manifestation of the delicate balance of metal-metal bond strength and the steric repulsion introduced by the bulky phosphorus-containing ligands.
    關聯: 嘉南學報 13:A59-A67 轉載 Journal of organometallic chemistry 248 : p.189-197 (1983)
    显示于类别:[嘉南學報] 13期 (1987)

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