The Reaction of Some Inorganic Lewis Bases and Acids with Organic Isocyanates

摘要

Inorganic Lewis Acids, such as CuBr2and NiCl2, act as catalysts in the trimerization of RNCO molecules. The mode of action is postulated as via a coordination compound intermediate, where the N atom of the RNCO molecule binds to the metal, leaving a positive charge at the C atom. The NO molecule also acts as a catalyst, in this case via the classical Ulrich mechanism. Infrared spectroscopy was used to characterize the reaction products.