Polymeric Organometallics as Precursors of Polymer Supported Catalysts.

摘要

This report describes work designed to characterize and systematically explore the chemistry of organometallic derivatives of graphite and polystyrene in order to determine more efficient methods for supported catalyst preparation. The descriptive chemistry of reactive alkali metal-graphite intercalation compounds and in particular the chemistry of potassium-graphite (C8K) is discussed and the results of mechanistic studies of the reducing ability of potassium-graphite are summarized. The preparation of hydrogenation catalysts from potassium-graphite and palladium (II) complexes is reported, although the nature of these catalysts (i.e. intercalated or supported palladium) has not been determined. Catalystic activity of these catalysts in olefin hydrogenation is comparable to palladium on carbon provided that any excess alkali metal-graphite has been quenched Methods for lithiation of polystyrene have been surveyed and an analytical procedure based on gas chromatography has been devised for analysis of polymeric organolithium species.