• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Chemistry: A European journal >Reactivity-Tuning in Frustrated Lewis Pairs: Nucleophilicity and Lewis Basicity of Sterically Hindered Phosphines
【24h】

Reactivity-Tuning in Frustrated Lewis Pairs: Nucleophilicity and Lewis Basicity of Sterically Hindered Phosphines

机译：在令人沮丧的Lewis对中的反应性调整：无核磷酸的亲核和lewis碱度

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 nucleophilicity and Lewis basicity of sterically hindered phosphines, widely used in catalysis and in frustrated Lewis pair (FLP) chemistry, have been quantified by determining the rates and equilibrium constants of their associations with reference systems (benzhydrylium and tritylium ions) of calibrated electrophilicities and Lewis acidities. These structure–reactivity investigations allow a rationalization of the Lewis acid–base interactions all along the way from covalent Lewis adducts to FLPs. Comparisons of the association of phosphines of increasing sizes (Ph_3P, (o-tolyl)_3P, and tBu_3P) with the triarylborane B(C_6F_5)_3 and with the isoelectronic tritylium ions Ar_3C~+ provide detailed insights for the future fine-tuning of the reactivities of FLPs. As a proof of concept, tritylium-ion-derived FLPs were shown to react with alkynes, as reported for the FLPs derived from the benchmark triarylborane B(C_6F_5)_3.
机译：通过测定与校准的电泳的参考系统（Benzhydrylium和Tritylium离子）确定其关联的速率和平衡常数，在催化作用和令人沮丧的Lewis对（FLP）化学中的空间阻碍膦的亲核和路易斯碱度已经通过校准的电泳的参考系统（Benzhydrylium和Tritylium离子）和校准的电泳 路易斯酸。 这些结构 - 反应性研究允许从共价Lewis加合物到FLPS的方式合理化路易斯酸碱相互作用。 增加尺寸（pH_3p，（o-olthylyl）和tbu_3p）与三芳基硼烷b（c_6f_5）_3和等电子特拉里钠离子AR_3C〜+的磷酸酯的比较提供了未来微调的详细洞察 FLP的反应。 作为概念证据，显示Tritylium-Ih-ermived FLPs与炔烃进行反应，如衍生自基准三芳基硼烷B（C_6F_5）_3的FLP。

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