Kinetic Studies of Isoprene Reactions Initiated by Chlorine Atom

Autor:	Renyi Zhang, Inseon Suh
Rok vydání:	2000
Předmět:	chemistry.chemical_compound Chemical ionization Reaction rate constant Chemistry Branching fraction Torr Radical Analytical chemistry Physical and Theoretical Chemistry Photochemistry Kinetic energy Isoprene Adduct
Zdroj:	ResearcherID
ISSN:	1520-5215 1089-5639
DOI:	10.1021/jp000605h
Popis:	The degradation reactions of isoprene initiated by chlorine atom were investigated using a fast-flow reactor coupled to chemical ionization mass spectrometry (CIMS) detection. The kinetic studies were performed in the pressure range of 5 to 10 Torr and at 298 ± 2 K. The rate constant for the reaction between Cl and isoprene was measured to be (4.0 ± 0.3) × 10-10 cm3 molecule-1 s-1. Using the CIMS method, we were able to directly detect the products of the Cl−isoprene reaction, HCl and Cl−isoprene adduct. A branching ratio of (17.4 ± 4.0)% was determined for the HCl formation. We have also measured the rate constant for the reaction of the Cl−isoprene adduct with molecular oxygen to form the β-chloroalkenylperoxy radicals, with a value of (1.0 ± 0.3) × 10-14 cm3 molecule-1 s-1. Atmospheric implications of the present experimental results are discussed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3ab8f637ac4b48ce20863c566aca3564 https://doi.org/10.1021/jp000605h Zobrazit plný text záznamu