Kinetics and branching ratios of the reactions NH2 + NO2 → N2O + H2O and NH2 + NO2 → H2NO + NO studied by pulse radiolysis combined with time-resolved infrared diode laser spectroscopy

Autor:	Palle Pagsberg, Hubert G. Meunier, Alfred Sillesen
Rok vydání:	1996
Předmět:	chemistry.chemical_compound Reaction rate constant Chemistry Infrared Radiolysis Kinetics Analytical chemistry General Physics and Astronomy Infrared spectroscopy Molecule Titration Physical and Theoretical Chemistry Methane
Zdroj:	Chemical Physics Letters. 261:277-282
ISSN:	0009-2614
DOI:	10.1016/0009-2614(96)00955-4
Popis:	The source reaction F + NH 3 → HF + NH 2 was initiated by the pulse radiolysis of NH 3 /SF 6 mixtures, and the primary yield of F atoms was determined by monitoring the decrease in the infrared absorption of methane consumed in the titration reaction F + CH 4 → HF + CH 3 . The title reactions have been studied by monitoring the decay of NH 2 and the simultaneous formation of N 2 O and NO by time-resolved infrared diode laser spectroscopy. The decay rate of NH 2 was studied as a function of NO 2 concentration to obtain an overall rate constant k (NH 2 + NO 2 ) = (1.35 ± 0.15) × 10 −11 molecule −1 cm 3 s −1 at 298 K and with a bath gas pressure of p (SF 6 ) = 40 mbar. Two product channels have been identified, N 2 O + H 2 O and H 2 NO + NO, with relative yields of (59 ± 3)% and (40 ± 5)%, respectively.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b31da6f7622cc43a59498d6a958a5c4c https://doi.org/10.1016/0009-2614(96)00955-4 Zobrazit plný text záznamu Full Text from ScienceDirect