LASER FLASH-PHOTOLYSIS STUDY OF THE HYDROGEN ABSTRACTION PROPERTIES OF ACENAPHTHENEQUINONE AND 1-ACENAPHTHENONE

Authors
DELUCAS NC NETTOFERREIRA JC
Citation
Nc. Delucas et Jc. Nettoferreira, LASER FLASH-PHOTOLYSIS STUDY OF THE HYDROGEN ABSTRACTION PROPERTIES OF ACENAPHTHENEQUINONE AND 1-ACENAPHTHENONE, Journal of photochemistry and photobiology. A, Chemistry, 116(3), 1998, pp. 203-208
Citations number
26
Categorie Soggetti
Chemistry Physical
Journal title
Journal of photochemistry and photobiology. A, Chemistry → ACNP
ISSN journal
10106030
Volume
116
Issue
3
Year of publication
1998
Pages
203 - 208
Database
ISI
SICI code
1010-6030(1998)116:3<203:LFSOTH>2.0.ZU;2-0
Abstract
Nanosecond laser flash photolysis has been used to study the kinetics of hydrogen abstraction by the triplets of acenaphthenequinone (3) and 1-acenaphthenone (4) from 1,4-cyclohexadiene, 2-propanol and phenols. Diketone 3 was found to be more reactive than monoketone 4. Hammett p lots for the reaction of these triplets with phenols gave similar reac tion constants (rho = -1.5) in acetonitrile solution. An Arrhenius plo t for the reaction of diketone 3 with 4-methoxyphenol gave E-a = 1.2 k cal mol(-1) and log A = 10.2. (C) 1998 Elsevier Science S.A. All right s reserved.