The Curious Case of Ketene in Zeolite Chemistry and Catalysis.

Ketenes in the limelight: The influential role of ketenes has never been adequately acknowledged in zeolite chemistry and catalysis; unlike other first generation highly reactive intermediates, such as carbocations, carbanions, radicals, and carbenes. In fact, the role that ketenes play during catalysis-whether beneficial or detrimental-is a contentious subject that requires further consideration.