Metalation of methallylbenzenes with BuLi gave dilithio derivatives which were dialkylated with methyl bromide. Derivatives of cross conjugated dianions are obtained preferentially to linear ones. The parent trimethylenemethane dianion2 was obtained by metalation of isobutene. Energies and atomic net charges of these and related molecules were calcualted. The question of the aromaticity of these systems
用BuLi将甲基烯丙基苯
金属化,得到二
硫代衍
生物,将其用甲基
溴二烷基化。交叉共轭二价阴离子的衍
生物优先于线性二价阴离子的衍
生物。通过
异丁烯的
金属化获得母体三亚甲基二价阴离子2。计算了这些分子和相关分子的能量和原子净电荷。讨论了这些系统的芳香性问题。