作者:Yasuhiko Kawamur、Marion Thurnauer、Gary B. Schuster
DOI:10.1016/s0040-4020(01)88080-7
日期:1986.1
3,4,4-tetramethylcyclobutene were investigated. Direct irradiation of this hydrocarbon leads to inefficient cyclization to a dehydrophenanthrene. Irradiation in the presence of diethyl terephthalate gives the cyclobutane radical cation and the ester radical anion. These intermediates were observed by laser flash photolysis. The cyclobutene radical cation does not rearrange rapidly to the radical cation
研究了1,2-二苯基-3,3,4,4-四甲基环丁烯的热和光化学反应。该烃的直接辐射导致低效环化成脱氢菲。在对苯二甲酸二乙酯存在下进行辐照,得到环丁烷自由基阳离子和酯自由基阴离子。通过激光闪光光解观察到这些中间体。环丁烯自由基阳离子不能快速重新排列为3,4-二苯基-2,5-二甲基-2,4-己二烯的自由基阳离子。闪蒸光解结果的分析,循环伏安行为的检查以及通过中性烃的冷冻氟利昂溶液的辐射分解形成的这些自由基阳离子的EPR光谱均支持该结论。