• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Kinetic Studies on the Reactions of Hydroxyl Radicals with Cyclic Ethers and Aliphatic Diethers
【24h】

Kinetic Studies on the Reactions of Hydroxyl Radicals with Cyclic Ethers and Aliphatic Diethers

机译：羟基自由基与环醚和脂肪族二醚反应的动力学研究

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

Rate coefficients for the reactions of hydroxyl radicals with a series of cyclic ethers and aliphatic diethers have been determined at 298 ± 2 K. Experiments were performed using a photolytic relative rate method at atmospheric pressure and the absolute rate technique of pulsed laser photolysis-laser induced fluorescence. The temperature dependence of the rate coefficients for the cyclic ethers was also studied over the temperature range 263-372 K. The rate coefficients show significant deviations from simple structure-activity relationships. The reactivity of the aliphatic diethers toward hydroxyl radicals is discussed in terms of the initial formation of a hydrogen-bonded adduct which then undergoes an intramolecular H atom transfer via five-, six-, and seven-membered-ring structures. The reactivity of cyclic ethers is also discussed in relation to adduct formation. However, because of steric restrictions, it is unlikely that the hydrogen-bonded adducts readily undergo H atom transfer via ring formation.
机译：羟基自由基与一系列环醚和脂肪族二醚的反应速率系数已确定为298±2K。在大气压力下使用光解相对速率法和脉冲激光光解激光诱导的绝对速率技术进行了实验荧光。还研究了在263-372 K的温度范围内，环醚的速率系数对温度的依赖性。速率系数显示出与简单的结构-活性关系显着偏离。讨论了脂族二醚对羟基自由基的反应性，涉及氢键加成物的初始形成，然后该氢键加成物通过五元，六元和七元环结构进行分子内H原子转移。还讨论了与加合物形成有关的环状醚的反应性。然而，由于空间限制，与氢键结合的加合物不太可能通过成环而容易地进行H原子转移。

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