Ketene vs. Oxacarbene formation in the photolysis of tricyclic ketones incorporating the 2-norbornanone system
Abstract
Evidence is presented that the unusual formation of ketene-derived products in the photolysis of certain tricyclic ketones incorporating the 2-norbornanone system results from conformational constraints in the biradical formed by α-cleavage that facilitate the hydrogen abstraction process leading to ketene formation.