FLASH-PHOTOLYSIS STUDY OF 2,4,6-TRIMETHYLPYRYLIUM AND 2,4,6-TRIPHENYLPYRYLIUM IONS - EVIDENCE FOR OXONIABENZVALENE INTERMEDIATE

Authors
SIVAKUMAR A PARIMALA S RAMAMURTHY P
Citation
A. Sivakumar et al., FLASH-PHOTOLYSIS STUDY OF 2,4,6-TRIMETHYLPYRYLIUM AND 2,4,6-TRIPHENYLPYRYLIUM IONS - EVIDENCE FOR OXONIABENZVALENE INTERMEDIATE, Journal of photochemistry and photobiology. A, Chemistry, 94(2-3), 1996, pp. 129-133
Citations number
17
Categorie Soggetti
Chemistry Physical
Journal title
Journal of photochemistry and photobiology. A, Chemistry → ACNP
ISSN journal
10106030
Volume
94
Issue
2-3
Year of publication
1996
Pages
129 - 133
Database
ISI
SICI code
1010-6030(1996)94:2-3<129:FSO2A2>2.0.ZU;2-9
Abstract
A flash photolysis study of 2,4,6-trimethylpyrylium perchlorate (TMP) and 2,4,6-triphenylpyrylium tetrafluoroborate (TPP) was performed in h ydroxylic medium. The transient absorptions observed for TMP and TPP i n methanol with maxima at 365 and 390 nm respectively are due to the f ormation of the intermediate oxoniabenzvalene. We also report the trip let-triplet absorption spectrum of TMP in methanol.