RADICAL INTERMEDIATES IN THE PHOTOCHEMICAL DECOMPOSITION OF P-TOLUENESULPHONATE (A KINETIC SPIN-TRAPPING STUDY)

Authors
BREZOVA V STASKO A BISKUPIC S
Citation
V. Brezova et al., RADICAL INTERMEDIATES IN THE PHOTOCHEMICAL DECOMPOSITION OF P-TOLUENESULPHONATE (A KINETIC SPIN-TRAPPING STUDY), Journal of photochemistry and photobiology. A, Chemistry, 71(3), 1993, pp. 229-235
Citations number
9
Categorie Soggetti
Chemistry Physical
Journal title
Journal of photochemistry and photobiology. A, Chemistry → ACNP
ISSN journal
10106030
Volume
71
Issue
3
Year of publication
1993
Pages
229 - 235
Database
ISI
SICI code
1010-6030(1993)71:3<229:RIITPD>2.0.ZU;2-V
Abstract
On irradiation of aqueous sodium p-toluenesulphonate solutions, the Na SO3. radical is formed, whose lifetime is approximately 5 x 10(-3) s, and which is characterized by a singlet electron paramagnetic resonanc e (EPR) spectrum with g = 2.0035. In the presence of 5,5-dimethyl-1-py rroline-N-oxide (DMPO) the main product found is the NaSO3.-DMPO adduc t with splitting constants a(N) = 1.45 mT and a(H) = 1.635 mT. Its for mation and decay can be described by formal first-order kinetics and a corresponding reaction scheme is suggested. HO.-DMPO and carbon-centr ed R3C.-DMPO adducts are observed as minor byproducts.