Nuclear magnetic resonance spectra of benzylsilanes and phenyldisilanes
作者:Frank K. Cartledge、Knut H. Riedel
DOI:10.1016/s0022-328x(00)88667-2
日期:1972.1
of substituted benzyldimethylsilanes (I) and phenyltetramethyldisilanes (II) are reported. 29SiH and 13CH coupling constants are shown to be correlated by Hammett σ constants. The data are discussed in terms of mechanisms of transmission of substituent effects across C—Si and Si—Si bonds. A good Hammettcorrelation is also found of J(13CH) for the benzylic protons of a series of substituted toluenes
Organosilane cation radicals which have tethered nucleophiles are found to undergo rapid intramolecular nucleophilic substitution in both high and low polarity solvents. This reaction competes with both separation and return electron transfer within the primary ionradicalpair generated by photoinduced bimolecular electron transfer. These results demonstrate the ability to effect ionradical substitutions