4H-1,3,2-Benzodioxasilines represent a class of monomers, which are suitable for the recently developed concept of twin polymerization. Relating to the prediction of quantum chemical calculations we are now able to confirm the results for the first step of the reaction: the selective ring opening of 4H-1,3,2-benzodioxasilines. An electrophilic attack of iodotrimethylsilane leads firstly to a bond cleavage at the oxymethylene group and not at the more stable Si–O–aryl bond, yielding ring-opened species.
4H-1,3,2-苯并二噁
硅烷是一类单体,适用于最近开发的孪生聚合概念。根据量子
化学计算的预测,我们现在能够确认反应第一步的结果:4H-1,3,2-苯并二噁基
苯胺的选择性开环。
碘三甲基
硅烷的亲电攻击首先导致氧亚甲基键断裂,而不是更稳定的 Si-O 芳基键断裂,从而产生开环物种。