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Laser Flash Photolysis of Chloranil in Solution

✍ Scribed by Elisabeth Guerry-Butty; Edwin Haselbach; Cécile Pasquier; Paul Suppan; David Phillips

Publisher
John Wiley and Sons
Year
1985
Tongue
German
Weight
406 KB
Volume
68
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

Chloranil (2,3,5,6‐tetrachloro‐2,5‐cyclohexadiene‐1,4‐dione; C) in deoxygenated acetonitrile shows transient absorptions which are assigned to the radical anion \documentclass{article}\pagestyle{empty}\begin{document}$ \rm {C}^{- \kern-4pt {.}} $\end{document} and to the triplet ^3^C*. The absorption due to \documentclass{article}\pagestyle{empty}\begin{document}$ \rm {C}^{- \kern-4pt {.}} $\end{document} rises ‘instantly’ during the 12 ns laser flash and then more gradually in a time of μs. This observation is explained as electron capture from neat acetonitrile by photoexcited C taking place from both its singlet and triplet states with rate constants estimated as 10^9^ and 10^4^ s^−1^ M^−1^, respectively.

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