An infrared study of the formation and photochemical decomposition of tetrachlorocyclopentadienone O-oxide in low temperature matrices

Article abstract of DOI:10.1016/0584-8539(86)80055-1

Photolysis of tetrachlorodiazocyclopentadiene at 12 K in Ar or N2 matrices containing O2 yields tetrachlorocyclopentadienone and tetrachloro-2-pyrone.Matrix i.r. spectra are reported for each of these products.The reaction proceeds by the addiition of O2 to the previously identified carbene, tetrachlorocyclopentadienylidene, giving initially the highly labile carbonyl oxide, tetrachlorocyclopentadienone O-oxide.The identification of the carbonyl oxide was assisted by experiments using isotopically labelled O2, and this reactive intermediate has now been characterized in low temperature matrices by both u.v.-visible and i.r. spectroscopy.