作者:K. Käppler、U. Scheim、K. Rühlmann、A. Porzel
DOI:10.1016/0022-328x(92)80186-2
日期:1992.12
suitable method. Initially the steric (δ) and inductive (ϱ) reaction constants for the reactions were determined with triorganylchlorosilanes, then the chlorosiloxanes were investigated kinetically. The chlorosiloxanes reacted up to 10 times faster than expected from the substituent constants we previously determined, and so we conclude that the inductive effect of the siloxy groups can vary when the charge
为了验证先前确定的甲硅烷氧基的取代基常数,已经对三有机基氯硅烷和一氯硅氧烷与硅烷醇锂和异丙基锂的反应进行了动力学研究。相对速率常数通过比浊法测定。这些值与通过1确定的值的比较1 H-NMR光谱表明,容易进行的比浊法是合适的方法。最初,用三有机基氯硅烷确定反应的空间(δ)和诱导(ϱ)反应常数,然后对氯硅氧烷进行动力学研究。氯硅氧烷的反应速度比我们先前确定的取代基常数预期的速度快10倍,因此我们得出结论,当反应中心的电荷发生变化时,甲硅烷氧基的诱导作用可能会发生变化。