【24h】

ELECTRON TRANSFER TO ENDOPEROXIDES: 3,3,6,6-TETRAARYL-1,2-DIOXANES AS MECHANSITIC PROBES

机译:电子向内毒素的转移:3,3,6,6-四芳基-1,2-二恶烷作为机电探针

获取原文
获取原文并翻译 | 示例

摘要

The electron transfer (ET) reduction of 3,3,6,6-tetraphenyl-1,2-dioxane (TPD) was studied to determine the influence of the aryl moiety on the ET reactivity of endoperoxides. It was determined that the initial ET occurs via competitive concerted and stepwise dissociative processes that result in the cleavage of the O-O bond. The distonic radical anion intermediate generated from the initial ET was found to have competing modes of reactivity, either a second ET or fragmentation process. The latter leads to the formation of the benzophenone radical anion that is the propagating species in an uncommon ET chain mechanism. The pathway followed by the distonic radical anion intermediate was dependent on whether the electron donor was heterogeneous (an electrode) or homogeneous (a radical anion in solution) and the driving force.
机译:研究了3,3,6,6-四苯基-1,2-二恶烷(TPD)的电子转移(ET)还原,以确定芳基部分对内过氧化物的ET反应性的影响。已确定初始ET是通过竞争性协调一致的逐步解离过程发生的,该过程导致O-O键断裂。发现从初始ET产生的二元自由基阴离子中间体具有竞争性的反应模式,无论是第二个ET还是裂解过程。后者导致二苯甲酮自由基阴离子的形成,这是一种不常见的ET链机理中的繁殖物种。二烯基自由基阴离子中间体所遵循的途径取决于电子给体是异质的(电极)还是均质的(溶液中的自由基阴离子)和驱动力。

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