Base-catalysed exchange of 2-H and 4-H in 3-thiatricyclo [2.2.1.02,6]heptane 3,3-dioxide (9) proceeds faster than the exchange of analogous hydrogens in cyclopropyl isopropyl sulphone (4), despite enforced pyramidalisation of the carbanion intermediates derived from (9).
                                    尽管在3-
硫代
三环[2.2.1.0 2,6 ]
庚烷3,3-二氧化物(9)中碱催化的2-H和4-H交换比环丙基
异丙基砜(4)中类似氢的交换要快。强制
金字塔化衍生自(9)的碳负离子中间体。