| 氟烷基化和氟烷氧基化的研究13: 2-卤四氟乙基物种的β-断裂 |
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| 引用本文： | 陈庆云,魏莫愁.氟烷基化和氟烷氧基化的研究13: 2-卤四氟乙基物种的β-断裂[J].化学学报,1987,45(4):354-358. |
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| 作者姓名： | 陈庆云 魏莫愁 |
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| 作者单位： | 中国科学院上海有机化学研究所 |
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| 摘 要： | 用典型自由基引发(hv,Cu,S2O4^2^-,ABN,DBP等),可以使2-卤四氟碘乙烷(1)(XCF2CF2I,X=Cl,I)产生四氟乙烯.从而证实了2-卤四氟乙基自由基在温和实验条件下能够发生β-断裂.1与亲核试剂(如PPh3,F^-,Cl^-,Br^-,CH3O^-,PhS^-等)作用结果,同样能得到四氟乙烯.这是符合离子型亲卤反应机理的.由此可见,1具有参与自由基机理和亲卤机理反应的双重性质.
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| 关 键 词： | 氯代烃 烷基化 化学键 四氟乙烯 氟代烃 自由基反应 亲核反应 乙烷P 断裂机理 碘代烃 |
Studies on fluoroalkylation and fluoroalkoxylation 13: \b-fragementation of 2-halotetrafluoroethyl species |
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| CHEN QINGYUN,WEI MOCHOU.Studies on fluoroalkylation and fluoroalkoxylation 13: \b-fragementation of 2-halotetrafluoroethyl species[J].Acta Chimica Sinica,1987,45(4):354-358. |
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| Authors: | CHEN QINGYUN WEI MOCHOU |
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| Abstract: | Utilizing the typical radical initiating methods (hn, Cu, S2O42-, etc.), 2-halotetrafluoroethyl iodide (XCF2CF2I, X = Cl, I) (I) was converted into tetrafluoroethylene. It may be rationalized in terms of the b-fragmentation of 2-halotetrafluoroethyl radical. However, tetrafluoroethylene may also be obtained in the reaction of I with nucleophiles (PPh3, F-, Cl-, Br-, CH3O-, PhS-, etc.) through halophilic mechanism. Thus, it is shown that 2-halotetrafluoroethyl iodide has a dual reactivity undergoing both radical and halophilic reactions. |
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| Keywords: | CHLOROHYDROCARBON ALKYLATION CHEMICAL BONDS TETRAFLUORO ETHYLENE FLUOROHYDROCARBON FREE RADICAL REACTION NUCLEOPHILIC REACTION ETHANE P FRACTURE MECHANISM IODOHYDROCARBON |
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