Evidence for a ketene intermediate in the photochemical transformation of matrix-isolated o-nitrobenzaldehyde
作者:Sławomir Kuberski、Jerzy Gȩbicki
DOI:10.1016/0022-2860(92)80185-k
日期:1992.12
Abstract The ketene intermediate generated upon photolysis at 313 or 350 nm of matrix-isolated o-nitrobenzaldehyde was stabilized and characterized by UV-vis and IR spectroscopy. Further irradiation resulted in the formation of o-nitrosobenzoic acid along with N-hydroxybenzisoxazolone. Exclusive formation of the acid was observed when photolysis was carried out wavelengths greater than 357 nm.
Impact of vibrational excitation on the kinetics of a nascent ketene
作者:Thomas Schmierer、Wolfgang J. Schreier、Florian O. Koller、Tobias E. Schrader、Peter Gilch
DOI:10.1039/b915451e
日期:——
formation and decay of a keteneintermediatephotochemically formed from o-nitrobenzaldehyde has been studied by femtosecond UV/Vis and IR spectroscopy. The ketene is formed predominantly within a few 100 fs and to a minor extent within ∼200 ps via the recombination of a triplet phased bi-radical. In tetrahydrofuran solution the keteneintermediate is seen to form a secondary intermediate with biphasic kinetics
Formation of a Tunneling Product in the Photorearrangement of <i>o</i>
-Nitrobenzaldehyde
作者:Dennis Gerbig、Peter R. Schreiner
DOI:10.1002/anie.201705140
日期:2017.8.1
The photochemicalrearrangement of o‐nitrobenzaldehyde to o‐nitrosobenzoic acid, first reported in 1901, has been shown to proceed via a distinct ketene intermediate. In the course of matrix isolation experiments in various host materials at temperatures as low as 3 K, the ketene was re‐investigated in its electronic and vibrational ground states. It was shown that hitherto unreported H‐tunneling dominates