...
  • 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 >Time-resolved resonance Raman observation of the dimerization of didehydroazepines in solution
【24h】

Time-resolved resonance Raman observation of the dimerization of didehydroazepines in solution

机译：时间分辨共振拉曼观察溶液中双氢e庚因的二聚化

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

Time-resolved resonance Raman (TR3) studies of the photochemistry of phenyl azide, 3-hyroxyphenyl azide, 3-methoxyphenyl azide and 3-nitrophenyl azide in acetonitrile: water solutions is reported. After photolysis of these four aryl azides in room temperature solutions, only one species was observed in the TR3 spectra for each azide, respectively at the probe wavelengths employed in the TR3 experiments. The species observed after photolysis of 3-nitrophenyl azide was assigned to 3,3'-dinitroazobenzene, an azo compound formed from the dimerization reaction of triplet 3-nitrophenylnitrene. In contrast, the species observed after photolysis of phenyl azide, 3-hydroxyphenyl azide and 3-methoxyphenyl azide were tentatively assigned to intermediates formed from the dimerization of didehydroazepines that are produced from the ring expansion reaction of the respective singlet arylnitrene. To our knowledge, this is the first time-resolved vibrational spectroscopic observation of the dimerization reaction of didehydroazepines in solution. In addition, these are the first resonance Raman spectra reported for dimers formed from didehydroazepines. We briefly discuss the structures, properties and chemical reactivity of the dimer species observed in the TR3 spectra and possible implications for the photochemistry of aryl azides.
机译：时间分辨共振拉曼（TR3）研究了乙腈：水溶液中叠氮化苯，3-羟基苯基叠氮化物，3-甲氧基苯基叠氮化物和3-硝基苯基叠氮化物的光化学反应。在室温溶液中将这四种芳基叠氮化物光解后，在TR3实验中采用的探针波长下，每种叠氮化物在TR3光谱中仅观察到一种物种。将3-硝基苯叠氮化物光解后观察到的物质分配给3,3'-二硝基偶氮苯，这是一种由三重态3-硝基苯基硝烯的二聚反应形成的偶氮化合物。相反，将苯叠氮化物，3-羟基苯基叠氮化物和3-甲氧基苯基叠氮化物光解后观察到的物质暂定归因于由双氢ze杂二聚物的二聚作用形成的中间体，所述二脱氢a杂因是由相应的单重芳基亚戊二烯的扩环反应产生的。据我们所知，这是溶液中双氢a庚因二聚反应的首次时间分辨振动光谱观察。另外，这些是报道的由双氢a庚因形成的二聚体的第一共振拉曼光谱。我们简要讨论了TR3光谱中观察到的二聚体物种的结构，性质和化学反应性，以及对芳基叠氮化物的光化学的可能影响。

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