作者:U. Scheim、A. Porzel、K. Rühlmann
DOI:10.1016/0022-328x(88)80636-3
日期:1988.10
The cleavage of siloxane bonds by BF3 was investigated kinetically by 1H NMR spectroscopy. The reactions could be evaluated by use of a pseudo-first order rate law, when a sufficiently large excess of BF3 was used. The order with respect to BF3 was found to be 4.7. The rate constants obtained could be correlated to σ*-values with a ϱ*-value of −1.0. The σ*-value found previously by 29Si NMR spectroscopy
通过1 H NMR光谱动力学研究了BF 3对硅氧烷键的裂解。当使用足够过量的BF 3时,可以通过使用伪一级速率定律评估反应。发现相对于BF 3的顺序为4.7。所得到的速率常数可以被关联到σ * -值与ρ * -1.0 -值。确认了先前通过29 Si NMR光谱法测得的Me 3 SiO基为0.35的σ *值。