Iodine- or Iodine Monobromide-Catalyzed Alkoxy–Alkoxy Exchange Reactions of Alkylalkoxysilanes: Formation of the Catalyst–Alkoxysilane Complexes and the Reaction Mechanism
作者:Katsuko Ito、Takeshi Ibaraki
DOI:10.1246/bcsj.61.2853
日期:1988.8
complexes of iodine and of iodine monobromide with alcohols and alkoxysilanes has been established spectroscopically, and the formation constants of iodine–ethoxytriethylsilane and iodine–diethoxydimethylsilane complexes has been determined as 0.55±0.01 and 0.61±0.02, respectively. On the basis of these observations and the kinetic information recently reported, the previously proposed mechanism for the
碘和一溴化碘与醇和烷氧基硅烷的电荷转移络合物的形成已经建立,碘-乙氧基三乙基硅烷和碘-二乙氧基二甲基硅烷络合物的形成常数分别确定为 0.55±0.01 和 0.61±0.02。根据这些观察和最近报道的动力学信息,重新讨论了先前提出的碘或一溴化碘催化烷氧基硅烷的烷氧基-烷氧基交换反应的机制。已经证实,涉及包含 CT 复合物的四中心过渡态的机制是最有利的。