Photochemistry of Ketones in Carbon Tetrachloride Solution
- 1 May 1973
- journal article
- Published by Canadian Science Publishing in Canadian Journal of Chemistry
- Vol. 51 (9) , 1435-1440
- https://doi.org/10.1139/v73-216
Abstract
Acetone, chloroacetone, 4-heptanone, 8-pentadecanone, 12-tricosanone, and dimethyl γ-keto pimellate were photolyzed at 3130 Å in carbon tetrachloride solution. The quantum yields of C2Cl6 formed, the decrease in Norrish type I and type II products, the copious yields of HCl and the Stern–Volmer quenching of ketone fluorescence by carbon tetrachloride provide definitive evidence for energy transfer which is rationalized by an exciplex mechanism of low efficiency. The excited [n,π*]1 state of the ketone forms a loose complex with the CCl4 and radiationless energy transfer leads to dissociation of the CCl4 in the primary chemical step.Keywords
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