Reaction of Type II biradicals with paraquat ions. Measurement of biradical lifetimes

Journal Article · Thu May 05 00:00:00 EDT 1977 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100524a005· OSTI ID:7305465

Small, R D; Scalano, J C

A laser photolysis study of the Norrish type II reaction of ..gamma..-methylvalerophenone in the presence of paraquat ions has allowed us to measure for the first time the lifetime of a type II biradical and the rate constant for the intermolecular reaction with paraquat ions. In methanol at room temperature tau/sub B/ = (97 +- 15) ns and k/sub T/ = (4.6 +- 1.0) x 10/sup 9/ M/sup -1/ s/sup -1/. The value of the lifetime is considerably shorter than values estimated previously from competitive studies. A fraction of the paraquat radical ions generated in the trapping step decay via reaction with the radical PhCOCH/sub 2/CH/sub 2/CMe/sub 2/.

• Research Organization: Univ. of Notre Dame, IN
• OSTI ID: 7305465
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 81:9; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
400500 -- Photochemistry
AROMATICS
AZINES
CATIONS
CHARGED PARTICLES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DECOMPOSITION
ELECTROMAGNETIC RADIATION
HETEROCYCLIC COMPOUNDS
INTERMEDIATE STRUCTURE
IONS
KETONES
KINETICS
LASER RADIATION
LIFETIME
MEDIUM TEMPERATURE
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
PYRIDINES
RADIATIONS
RADICALS
REACTION KINETICS