Photocyclisation of phenylbenzoquinone: a time resolved photoacoustic calorimetric and flash photolytic study

Chattopadhyay, Nitin ; Serpa, Carlos ; Arnaut, Luis G. ; Formosinho, Sebastião J. (2003) Photocyclisation of phenylbenzoquinone: a time resolved photoacoustic calorimetric and flash photolytic study Indian Journal of Chemistry - Section A: Inorganic, Physical, Theoretical and Analytical Chemistry, 42 . pp. 1827-1832. ISSN 0376-4710

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Abstract

Energetics of formation of the intermediate during the photocyclisation of phenylbenzoquinone (PBQ) to 2-hydroxydibenzofuran (HDBF) in methanol solvent has been investigated by employing the time-resolved photoacoustic calorimetric (TRPAC) technique. The study, in conjugation with the nanosecond/microsecond flash photolytic observations, confirms the formation of a long lived intermediate during the photocyclisation reaction. TRPAC result and semi-empirical (AM1 and PM3) calculations suggest that the intermediate is a biradical.

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Deposited On:19 Dec 2011 04:18
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