Racemisation rates for the indenes (1) provide migratory aptitudes for acyl, vinyl, ethynyl, nitrile, and alkyl groups, as well as hydrogen; it is proposed that the fast migration of formyl, acetyl, and benzoyl groups is, at least in part, due to a secondary interaction involving the carbonyl π* orbital.
中间体的外消旋化速率(1)提供了酰基,
乙烯基,
乙炔基,腈和烷基以及氢的迁移能力;提出甲酰基,乙酰基和苯甲酰基的快速迁移至少部分是由于涉及羰基π *轨道的次级相互作用。