A systematic chemistry of organic reactions on solid acids.

摘要

The reactions of a number of organic molecules on a variety of solid acids including zeolite solid acids and metal halide solid superacids have been systematically studied using in situ solid state ;The reactions of ketones with or without ammonia as co-adsorbate were investigated on a variety of zeolites with different acidities and pore sizes. The overall reaction sequence for ketones was acid catalyzed aldol condensations followed by secondary reactions such as double bond migration, hydrogen transfer and cracking. The ketones and their aldol condensation products form adsorption complexes with Bronsted acid sites of the zeolites. The strength of complex formation was reflected in the ;Two classes of carbenium ions, cyclopentenyl ions and indanyl ions, were observed and characterized on zeolite solid acids by ;A general method for the preparation of carbenium ions in the solid state was developed in this dissertation, based on the use of solid Lewis superacids, such as AlBr