Publication details

Temperature Dependent Solvent Effects in Photochemistry of 1-Phenylpentan-1-ones

Authors

KLÁN Petr LITERÁK Jaromír

Year of publication 1999
Type Article in Periodical
Magazine / Source Collection of Czechoslovak Chemical Communications
MU Faculty or unit

Faculty of Science

Citation
Field Organic chemistry
Keywords Photochemistry
Description Temperature dependent solvent effects have been investigated on the Norrish Type II reaction of 1-phenylpentan-1-one and its p-methyl derivative. Efficiencies of the photoreaction were studied in terms of solvent polarity and base addition as a function of temperature. Such a small structure change as the p-methyl substitution in 1-phenylpentan-1-one altered the temperature dependent photoreactivity in presence of weak bases. The experimental results suggest that the hydrogen bonding between the Type II biradical intermediate OH group and the solvent is weaker for 1-(4-methylphenyl)pentan-1-one than that for 1-phenylpentan-1-one at 20 degrees C but the interactions probably vanish in both cases at 80 degrees C.
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