iodomethane, yields hexa-t-butyl-1,3-dimethyltrisilane. The X-ray structure analysis reveals a symmetric molecule with very long SiSi (259.3 pm) and SiC(methyl) (200.5 pm) bonds. Empirical force field calculations show that the acyclic trisilane has C2 ground state geometry. The energy of a local minimum with C1 conformation is 12 kcal mol−1 higher than the ground state level.
六叔丁基-1,3-二
碘代三
硅烷在低温下进行二甲酰化,然后用
碘甲烷处理,得到六叔丁基-1,3-二甲基三
硅烷。X射线结构分析揭示了一个具有很长的SiSi(259.3 pm)和SiC(甲基)(200.5 pm)键的对称分子。经验力场计算表明,无环乙
硅烷具有C 2基态几何形状。具有C 1构象的局部最小值的能量比基态能级高12 kcal mol -1。