Photochemically-induced hydrogen shifts in 7-(p-chlorophenyl), 7-phenyl, 7-(p-methoxyphenyl) and 7-p-tolylcycloheptatrienes (Ia—d) were studied. The possibility of hydrogen 1,7 and 1,3 shifts in these compounds was examined on both experimental and theoretical grounds. It was concluded that the hydrogen 1,7 shift is the only suprafacial hydrogen shift possible in the excited cycloheptatriene system. In this study all the isomers of p-chlorophenylcycloheptatriene were separated by applying the Diels-Alder reaction to the photo-reaction mixture; the method of preparing each of those isomers will also be described.
                                    研究了7-(对
氯苯基)、7-苯基、7-(对
甲氧基苯基)和7-对甲基苯基环七烯(Ia—d)中的光
化学诱导氢转移。对这些化合物中氢的1,7和1,3转移的可能性进行了实验和理论方面的研究。得出的结论是,在激发的环七烯体系中,氢的1,7转移是唯一可能的超面氢转移。研究中,通过将Diels-Alder反应应用于光反应混合物,分离了所有的对
氯苯基环七烯异构体;还将描述每种异构体的制备方法。