Synthesis, Structure, and Reactivity of an Osmacyclopentene Complex

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• 作者：Feifei Han ; Tongdao Wang ; Jinhua Li ; Hong Zhang ; Laiying Zhang ; Xumin He ; Haiping Xia
• 刊名：Organometallics
• 出版年：2014
• 出版时间：October 13, 2014
• 年：2014
• 卷：33
• 期：19
• 页码：5301-5307
• 全文大小：422K
• ISSN：1520-6041

文摘

Treatment of OsCl₂(PPh₃)₂(CH鈺怌(PPh₃)CH(OH)-畏²-C鈮H) (1) with PPh₃ and Bu₄NCl in CH₂Cl₂ under air gave paramagnetic osmacyclopentene [OsCl₂(PPh₃)₂(CH鈺怌(PPh₃)CH(OH)C(鈺怌H(PPh₃)))]Cl (5). Heating the suspension of 5 in CH₂Cl₂ under a nitrogen atmosphere led to the formation of 畏²-allene-coordinated osmacycle OsCl₂(PPh₃)(CH鈺怌(PPh₃)CH鈺怌鈺怌H(P(C₆H₄)Ph₂)) (6) and chloro-osmabenzene OsCl₂(PPh₃)₂(CHC(PPh₃)CHCClCH) (7) via disproportionation reaction. Oxidative transformation of 5 under an oxygen atmosphere yielded osmafuran [OsCl(PPh₃)₂(CHC(PPh₃)CHO)(C鈮(PPh₃))]Cl (10). In addtion, complexes 6, 7, and 10 can also undergo ligand substitution reactions with NaSCN to afford more stable analogues.