Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases p. 1945 - 1952 (1981)
Update date:2022-08-11
Topics:
Cross, Stephen N. W.
Rochester, Colin H.
Infrared spectra are reported of silica immersed in solutions of ethyl isocyanate in carbon tetrachloride.Interactions between surface silanol groups and ethyl isocyanate led to the formation of a surface urethane, ethylamine and 1,3-diethylurea as the products of adsorption.Increasing hydroxyl population of the silica surface enhanced the formation of 1,3-diethylurea but diminished the extent of reaction of isolated silanol groups to give urethane.Adsorbed ethylammonium ions were produced by proton transfer from silanol groups to ethylamine molecules at the solid/liquid interface.The results are discussed in relation to previous spectroscopic data for the adsorption of ethyl isocyanate on silica at the solid/vapour interface.
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