...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >Products of the Gas-Phase Reactions of O_3 with Alkenes
【24h】

Products of the Gas-Phase Reactions of O_3 with Alkenes

机译：O_3与烯烃的气相反应产物

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The products of the gas-phase reactions of O_3 with 1-pentene, 1-hexene, 1-heptene, 1-octene, 2,3-dimethyl-1-butene, cyclopentene, and 1-methyl-cyclohexene have been investigated at room temperature and 740 Torrtotal pressure of air in the presence of cyclohexane or n-octane to scavenge OH radicals. Products were identified and quantified by gas chromatography and in situ Fourier transform infrared absorption spectroscopy. In the presence of cyclohexane, cyclohexanone and cyclohexanol were observed as products, showing the formation of OH radicals from these O_3 reactions. The OH radical formation yields derived were as follows: 1-pentene, 0.37; 1-hexene, 0.32; 1-heptene, 0.27; 1-octene, 0.18; 2,3-dimethyl-1-butene, 0.50; cyclopentene, 0.61; and 1-methylcyclohexene, 0.90, all with estimated overall uncertainties of a factor of ～1.5. The carbonyl products identified and quantified were as follows: from 1-pentene: butanal, 0.541 ± 0.065, and HCHO, 0.595 ± 0.055; from 1-hexene: pentanal, 0.518 ± 0.095, and HCHO, 0.575 ± 0.057; from 1-heptene: hexanal, 0.582 ± 0.078, and HCHO, 0.533 ± 0.049; from 1-octene: heptanal, 0.527 ± 0.070, and HCHO, 0.519 ± 0.054; from 2,3-dimethyl-1-butene: 3-methyl-2-butanone, 0.391 ± 0.050, and HCHO, 0.776 ± 0.071;from cyclopentene: butanal, 0.195 ± 0.027; and from 1-methylcyclohexene: 5-acetylpentanal, 0.100 ± 0.024. For the 1-alkenes, the sum of the two carbonyl products expected from the decomposition of the initially formed primary ozonide is 1.1 ± 0.1, consistent with the presently believed reaction mechanism. The 3-methyl-2-butanone and HCHO yields from 2,3-dimethyl-1-butene showthatthe primary ozonide decomposes preferentially to HCHO plus the dialkyl-substituted [(CH_3)_2CHC(CH_3)OO]~* biradical rather than to 3-methyl-2-butanone plus the [CH_2OO]~* biradical.
机译：在室温下研究了O_3与1-戊烯，1-己烯，1-庚烯，1-辛烯，2,3-二甲基-1-丁烯，环戊烯和1-甲基-环己烯的气相反应产物在存在环己烷或正辛烷的条件下，空气的最高温度和740的总压力可清除OH自由基。通过气相色谱和原位傅里叶变换红外吸收光谱对产物进行鉴定和定量。在存在环己烷的情况下，观察到环己酮和环己醇为产物，表明由这些O_3反应形成OH自由基。所得到的OH自由基形成产率如下：1-戊烯，0.37； N，1-三烯，0.37。 1-己烯，0.32; 1-庚烯0.27; 1-辛烯，0.18; 2,3-二甲基-1-丁烯，0.50;环戊烯0.61; 1-甲基环己烯为0.90，估计的总体不确定性约为1.5。鉴定和定量的羰基产物如下：从1-戊烯：丁醛，0.541±0.065，和HCHO，0.595±0.055。 1-己烯：戊醛，0.518±0.095，和HCHO，0.575±0.057;来自1-庚烯：己醛，0.582±0.078，和HCHO，0.533±0.049；来自1-辛烯：庚醛，0.527±0.070，和HCHO，0.519±0.054；由2,3-二甲基-1-丁烯：3-甲基-2-丁酮，0.391±0.050和HCHO，0.776±0.071;由环戊烯：丁醛，0.195±0.027;和来自1-甲基环己烯的5-乙酰基戊醛，0.100±0.024。对于1-烯烃，从最初形成的初级臭氧化物的分解预期的两个羰基产物的总和为1.1±0.1，与目前认为的反应机理一致。 2,3-二甲基-1-丁烯的3-甲基-2-丁酮和HCHO收率表明，主要的臭氧化物优先分解为HCHO加二烷基取代的[（CH_3）_2CHC（CH_3）OO]〜*双自由基-甲基-2-丁酮加[CH_2OO]〜*双自由基。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号