Crossover experiments between isotopomeric species of 2-diazo-1-oxo-1-phenylethane (18O, 13C, D) establish beyond doubt that the oxygen migration accompanying the photochemical Wolff rearrangement is not the result of intermolecular processes. This is in agreement with a carbenecarbene rearrangement via an intermediate oxirene in competition to the rearrangement into a ketene, as reason for the partial
2-diazo-1-oxo-1-phenylethane (18O, 13C, D) 的同位素物种之间的交叉实验毫无疑问地确定伴随光
化学沃尔夫重排的氧迁移不是分子间过程的结果。这与通过中间体
环氧乙烷的卡宾卡宾重排与重排为烯酮的竞争一致,这是沃尔夫重排产物中部分氧迁移的原因。