Direct experimental probing and theoretical analysis of the reaction between the simplest Criegee intermediate CH 2 OO and isoprene
Journal Article
·
· Physical Chemistry Chemical Physics. PCCP
Recent advances in the spectroscopy of Criegee intermediates (CI) have enabled direct kinetic studies of these highly reactive chemical species. The impact of CI chemistry is currently being incorporated into atmospheric models, including their reactions with trace organic and inorganic compounds. Isoprene, C5H8, is a doubly-unsaturated hydrocarbon that accounts for the largest share of all biogenic emissions around the globe and is also a building block of larger volatile organic compounds. We report direct measurements of the reaction of the simplest CI (CH2OO) with isoprene, using time-resolved cavity-enhanced UV absorption spectroscopy. We find the reaction to be pressure-independent between 15–100 Torr, with a rate coefficient that varies from (1.5 ± 0.1) × 10–15 cm3 molecule–1 s–1 at room temperature to (23 ± 2) × 10–15 cm3 molecule–1 s–1 at 540 K. Quantum chemical and transition-state theory calculations of 16 unique channels for CH2OO + isoprene somewhat underpredict the observed T-dependence of the total reaction rate coefficient, but are overall in good agreement with the experimental measurements. Finally, this reaction is broadly similar to those with smaller alkenes, proceeding by 1,3-dipolar cycloaddition to one of the two conjugated double bonds of isoprene.
- Research Organization:
- Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
- Grant/Contract Number:
- AC04-94AL85000
- OSTI ID:
- 1346700
- Report Number(s):
- SAND--2017-2417J; 651479
- Journal Information:
- Physical Chemistry Chemical Physics. PCCP, Journal Name: Physical Chemistry Chemical Physics. PCCP Journal Issue: 12 Vol. 19; ISSN 1463-9076; ISSN PPCPFQ
- Publisher:
- Royal Society of ChemistryCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Four-Carbon Criegee Intermediate from Isoprene Ozonolysis: Methyl Vinyl Ketone Oxide Synthesis, Infrared Spectrum, and OH Production
Direct kinetics study of CH2OO + methyl vinyl ketone and CH2OO + methacrolein reactions and an upper limit determination for CH2OO + CO reaction
Infrared absorption spectrum of the simplest deuterated Criegee intermediate CD{sub 2}OO
Journal Article
·
Thu Aug 02 20:00:00 EDT 2018
· Journal of the American Chemical Society
·
OSTI ID:1598267
Direct kinetics study of CH2OO + methyl vinyl ketone and CH2OO + methacrolein reactions and an upper limit determination for CH2OO + CO reaction
Journal Article
·
Mon Jul 02 20:00:00 EDT 2018
· Physical Chemistry Chemical Physics. PCCP
·
OSTI ID:1496987
Infrared absorption spectrum of the simplest deuterated Criegee intermediate CD{sub 2}OO
Journal Article
·
Thu Jul 28 00:00:00 EDT 2016
· Journal of Chemical Physics
·
OSTI ID:22679049