Dimesitylcarbene (2a) was shown to decay by undergoing dimerization and to have a half-life of 160 ms, some 5 orders of magnitude longer-lived than diphenylcarbene. Didurylcarbene (2b) was twice as long-lived as 2a, while decamethyldiphenylcarbene (2c) decayed mainly unimolecularly by abstracting H from the o-methyl group and became shorter-lived than 2b. 2,4,6-Tri(tert-butyl)diphenylcarbene (14) decayed
Dimesitylcarbene (2a) 显示通过二聚作用而衰变,半衰期为 160 ms,比二苯基卡宾长约 5 个数量级。二十二烷基卡宾 (2b) 的寿命是 2a 的两倍,而十甲基二苯基卡宾 (2c) 主要通过从邻甲基中提取 H 以单分子方式衰变,并且比 2b 寿命更短。2,4,6-三(叔丁基)二苯基卡宾 (14) 几乎完全通过从邻叔丁基中提取 H 进行单分子衰变,并显示出 125 μs 的寿命。2c 和 14 的 H 和 D 提取的阿伦尼乌斯图提供了与经典原子转移反应一致的数据,尽管两个系统之间的动力学参数非常不同。