作者:U. Scheim、R. Lehnert、A. Porzel、K. Rühlmann
DOI:10.1016/0022-328x(88)83083-3
日期:1988.11
NMR spectroscopy has been used in a kinetic study of the cleavage of siloxane bonds by hydrogen chloride in dioxane. The cleavages show an induction period which is associated with the autocatalytic effect of the water formed during the reaction. The kinetic behavior can be expressed in terms of a rate law that includes rate contants for cleavage by both dioxane. HCl (k1) and H2O·HCl(k2). The k′1 (k′1
1 H NMR光谱已用于在二恶烷中通过氯化氢裂解硅氧烷键的动力学研究。裂解显示诱导期,该诱导期与反应过程中形成的水的自催化作用有关。动力学行为可以用速率定律表达,该速率定律包括被二恶烷裂解的速率竞争物。HCl(k 1)和H 2 O·HCl(k 2)。所述ķ ' 1(ķ ' 1 ķ 1 ·[HCl]的-4)和ķ ' 2(ķ ' 2 ķ2 ·[HCl] -3)值与σ *值相关;从而ρ *是为获得1.4和0.7值ķ ' 1和ķ ' 2分别。我们先前为Me 3 SiO基得出的σ *值为0.35,适用于该反应。