1. Kinetic studies of the laser-induced photodecarbonylation of 3,5-di-tert-butyl-1,2-benzoquinone
- Author
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B. Alkenings, Hans Bettermann, I. Dasting, and H.-J. Schroers
- Subjects
chemistry.chemical_compound ,Chemistry ,Kinetics ,General Engineering ,Emission spectrum ,Solvent effects ,Ring (chemistry) ,Photochemistry ,Spectral line ,Excitation ,Quinone ,1,2-Benzoquinone - Abstract
The photodecarbonylation of 3,5-di-tert-butyl-1,2-benzoquinone was initiated by excitation of the 1 (π−π*) and the 1 ( n −π*) state, respectively, with the use of emission lines of an argon ion laser. The UV—vis reaction spectra exhibit a strong sensitivity to the selected solvents. Both UV—vis spectra and MR spectra show the existence of a persistent bis-ketene intermediate. The kinetic analysis yields that the course of reaction can be described as a consecutive process. The primary step acts as a light-induced electrocyclic ring cleavage generating the intermediate. In the second step, the CO abstraction leads to the corresponding monoketone.
- Published
- 1993
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