Proton-magnetic-resonance spectra of some organoethoxysilanes |
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Authors: | V A Pestunovich M G Voronkov E Ya Lukevits G V Motsarev L A Zhagata A E Pestunovich |
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Institution: | (1) Institute of Organic Synthesis, AS LatvSSR, Riga |
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Abstract: | The PMR spectra of 33 organoethoxysilanes have been investigated. Comparison of the chemical shifts of C2H5O and CH3 groups attached to the silicon atom with the values of the remaining substituents at the central silicon atom gives reason to suppose that the contribution of each atom in p– interaction decreases with increased number of ethoxy groups at the silicon atom, while the over-all effect of increased electron density at the silicon heteroatom arising from this interaction increases. The Taft constants for several substituents are calculated. |
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