cyclopropenes containing a heteroatom on the side chain has been studied in mechanistitic detail. The triplet state was found to undergo H-atom abstraction by a mechanism analogous to the well-known Norrish type II process of carbonyl compounds. Rate constants for H-abstraction were obtained by plotting Φ0Φq trans-stilbene at a constant quencher to cyclopropene ratio. The rate constants for H-abstraction were
在机械细节上已经研究了许多在侧链上含有杂原子的3-烷基取代的环
丙烯的三重态敏化行为。发现三重态通过类似于众所周知的羰基化合物的Norrish II型过程的机理经历了H原子的提取。通过以恒定的淬灭剂与环
丙烯之比绘制Φ0Φq反式
二苯乙烯,可得到H萃取的速率常数。发现与氢相关的速率常数比相关的苯基烷基酮的速率常数小两个数量级,并且随着在γ-位的CH键的强度降低而增加。讨论了电子从侧链杂原子转移到π-π *三重态的可能性。