The acetates, benzoates, hydrogen phthalates and S-methyl xanthates of cyclooctanol and cyclodecanol have been pyrolyzed, and the pyrolysates have been analyzed with emphasis on the detection of possible transannular products. The acetates and benzoates gave open- chained or, w-dienes and the expected cyclic olefins: small amounts of bicyclic compounds and ring contraction products were formed along with the cyclic olefins from the hydrogen ...