J 1999

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

KLÁN, Petr and Jaromír LITERÁK

Basic information

Original name

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

Authors

KLÁN, Petr (203 Czech Republic, guarantor) and Jaromír LITERÁK (203 Czech Republic)

Edition

Collection of Czechoslovak Chemical Communications, Prague, Inst. Org. Chem. Bioch. Czech Acad. Sci. 1999, 0010-0765

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10401 Organic chemistry

Country of publisher

Czech Republic

Confidentiality degree

není předmětem státního či obchodního tajemství

Impact factor

Impact factor: 0.717

RIV identification code

RIV/00216224:14310/99:00001259

Organization unit

Faculty of Science

UT WoS

000085090700008

Keywords (in Czech)

Fotochemie

Keywords in English

Photochemistry
Změněno: 7/4/2010 18:27, Mgr. Jaromír Literák, Ph.D.

Abstract

V originále

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.

In Czech

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.

Links

MSM 143100011, plan (intention)
Name: Struktura a vazebné poměry, vlastnosti a analýza syntetických a přírodních molekulových ansamblů
Investor: Ministry of Education, Youth and Sports of the CR, Structure and character of bonding, properties and analysis of synthetic and natural molecular ensembles