Document Detail


Reaction of Hydroxyl Radicals with C<sub>4</sub>H<sub>5</sub>N (Pyrrole): Temperature and Pressure Dependent Rate Coefficients.
MedLine Citation:
PMID:  22264135     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Absolute (pulsed laser photolysis, 4 - 639 Torr N2 or air, 240-357 K) and relative rate methods (50 and 760 Torr air, 296 K) were used to measure rate coefficients k1 for the title reaction, OH + C4H5N -> products (R1). Whilst the pressure and temperature dependent rate coefficient is adequately represented by a fall-off parameterization, calculations of the potential energy surface indicate a complex reaction system with multiple reaction paths (addition only) in the fall-off regime. At 298 K and 760 Torr (1 Torr = 1.33 mbar) the rate coefficient obtained from the parameterization is k1 = (1.28 ± 0.1) x 10-10 cm3 molecule-1 s-1, in good agreement with the value of (1.10 ± 0.27)×10-10 cm3 molecule-1 s-1 obtained in the relative rate study (relative to C5H8, isoprene) at this temperature and pressure. The accuracy of the absolute rate coefficient determination was enhanced by on-line optical absorption measurements of the C4H5N concentration at 184.9 nm using a value σ184.9nm = (1.26 ± 0.02)x10-17 cm2 molecule-1, which was determined in this work.
Authors:
Terry J Dillon; Maria Eugenia Tucceri; Katrin Dulitz; Abraham Horowitz; Luc Vereecken; John Nicholas Crowley
Related Documents :
3737715 - Blood pressure responses to milk ejection in the young rat.
6639165 - Determining criteria for shunt placement during carotid endarterectomy. eeg versus back...
21730685 - Multiple radial corrugations in multiwalled carbon nanotubes under pressure.
4055605 - Respiratory effects of brief baroreceptor stimuli in the anesthetized dog.
1274025 - Electromyographic and gas urethral pressure profile.
9708665 - Left ventricular diastolic filling in the elderly: the cardiovascular health study.
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-1-20
Journal Detail:
Title:  The journal of physical chemistry. A     Volume:  -     ISSN:  1520-5215     ISO Abbreviation:  -     Publication Date:  2012 Jan 
Date Detail:
Created Date:  2012-1-23     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9890903     Medline TA:  J Phys Chem A     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  The short-term treatment effects of face mask therapy in Class III patients based on the anchorage d...
Next Document:  A case of recurrent impetigo herpetiformis treated with systemic corticosteroids and narrowband UVB.