Regiochemical Substituent Switching of Spin States in Aryl(trifluoromethyl)carbenes
作者:Myoung-Geun Song、Robert S. Sheridan
DOI:10.1021/ja209613u
日期:2011.12.14
Although aryl(trifluoromethyl)diazirines have achieved great popularity in photoaffinity labeling applications, the properties of the corresponding carbenes have not been as widely explored. Here, low-temperature matrix-isolation spectroscopy and reactivity studies indicate that in contrast to m-methoxyphenyl(trifluoromethyl)carbene and most known aryl(CF(3))carbenes, the para isomer is a ground-state
尽管芳基(三氟甲基)二氮丙啶在光亲和标记应用中非常受欢迎,但相应的卡宾的性质尚未得到广泛探索。在这里,低温基质分离光谱和反应性研究表明,与间甲氧基苯基(三氟甲基)卡宾和大多数已知的芳基(CF(3))卡宾相比,对位异构体是基态单线态而不是三线态。DFT 计算支持这些结果以及 p-CH(3)O 组通过共振稳定单线态卡宾的概念。这些结果可能与光亲和应用中广泛的取代芳基 (CF(3)) diazirines 相关。