第10讲-阳离子中间体-烯烃:形成、加成和稳定性Lecture 10 - Cation Intermediates – Alkenes: Formation, Addition, and Stability |
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课程网址: | http://videolectures.net/yalespan125bs2011_mcbride_lec10/ |
主讲教师: | J. Michael McBride |
开课单位: | 耶鲁大学 |
开课时间: | 2014-08-19 |
课程语种: | 英语 |
中文简介: | 桥联五价碳结构可能是SN1反应中阳离子重排的中间产物或过渡态,短寿命的离子对解释了净立体化学反转。制备有机化学家和机械有机化学家对反应产率的不同观点通过一项旨在证明分子旋转在粘性溶剂中可能是速率限制的研究来说明。烯烃的“亲电”加成反应与E2或E1反应相反,其机理可通过类似技术进行研究。NIST Webbook提供热化学数据,帮助理解异构烯烃的相对稳定性。 |
课程简介: | Bridged pentavalent carbon structures can be intermediates or transition states of cation rearrangement during SN1 reactions, and short-lived ion pairs explain net stereochemical inversion. The different perspectives of preparative organic chemists and mechanistic organic chemists on reaction yields are illustrated by a study designed to demonstrate that molecular rotation can be rate-limiting in viscous solvents. "Electrophilic" addition to alkenes is the reverse of E2 or E1 reaction, and its mechanisms can be studied by analogous techniques. The NIST Webbook provides thermochemical data to help understand the relative stability of isomeric alkenes. |
关 键 词: | 桥联五价碳结构; 异构烯烃; 阳离子重排 |
课程来源: | 视频讲座网 |
数据采集: | 2021-11-19:zkj |
最后编审: | 2021-11-19:zkj |
阅读次数: | 51 |