✦ LIBER ✦

The flash photolysis of azomethane. Minor products from the photolysis of methyl radicals and a rate constant for CH3 + NO

✍ Scribed by M. J. Pilling; James A. Robertson; Graham J. Rogers

Publisher: John Wiley and Sons
Year: 1976
Tongue: English
Weight: 661 KB
Volume: 8
Category: Article
ISSN: 0538-8066
DOI: 10.1002/kin.550080608

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

The flash photolysis of azomethane in a quartz reaction vessel produces mainly ethane (>75%) plus smaller quantities of methane, ethylene, and acetylene. The minor products are interpreted quantitatively in terms of methyl radical photolysis at 216 nm to give CH~2~ and H. This interpretation is substantiated by the dependence of the minor products on flash intensity. The reduction of the ethane yield on adding NO is employed to obtain a rate constant for CH~3~ + NO as a function of total pressure, based on a value for methyl radical recombination of 4.2 × 10^−11^ cm^3^/molec · sec. An RRKM analysis is used to extrapolate the data to give a limiting high‐pressure rate constant for CH~3~ + NO of (1.2 ± 0.1) × 10^−11^ cm^3^/molec · sec at 298°K.

📜 SIMILAR VOLUMES

A laser-photolysis/lif study of the rate

A laser-photolysis/lif study of the rate constant for the reaction CH3O + O → products at 298 K

✍ D. Rhäsa; R. Zellner 📂 Article 📅 1986 🏛 Elsevier Science 🌐 English ⚖ 387 KB

The kinetics of the reaction CH30 + 0 -+ products at 298 K has been investigated using laser-induced fluorescence (LIF) for the time-resolved detection of CHsO radicals. The rate constant kr is found to be (2.5 f 0.7) X lo-" cm3/s. The reaction is assumed to proceed by at least two different product

A laser photolysis/LIF study of the rate

A laser photolysis/LIF study of the rate constant for the reaction CF3O+O3→products

✍ Ch. Fockenberg; H. Saathoff; R. Zellner 📂 Article 📅 1994 🏛 Elsevier Science 🌐 English ⚖ 709 KB

Photolysis of CF3NO as a source of CF3 r

Photolysis of CF3NO as a source of CF3 radicals, rate constant of the CF3 + CF3NO reaction at 296 K

✍ A. B. Garmanov; A. B. Vakhtin 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English ⚖ 456 KB 👁 2 views

The linear absorption cross-sections and photodissociation quantum yields for C F 3 N 0 have been measured at the wavelengths 694 3 and 632 8 nm (ruby and He-Ne lasers respectively) in a wide range of total pressure at T = 296 K The secondary reactions following the photolysis of C F 3 N 0 have been

Minor processes in the photolysis of azo

Minor processes in the photolysis of azomethane at low pressure: An upper limit for the rate of the unimolecular elimination of H2 from vibrationally excited ethane

✍ J. M. Roscoe; C. Blatt; R. A. Back 📂 Article 📅 1991 🏛 John Wiley and Sons 🌐 English ⚖ 332 KB

The photolysis of azomethane in the near UV has been studied at room temperature and pressures from 10 mtorr to 10 torr. The main products, CzHs and Nz, accounted for more than 9% of the reaction. Minor hydrocarbon products observed were (with quantum yields) C ~H B (3.5 x and n-C4Hlo (trace). Quant

Product formation from the reaction of t

Product formation from the reaction of the NO3 radical with isoprene and rate constants for the reactions of methacrolein and methyl vinyl ketone with the NO3 radical

✍ Eric S. C. Kwok; Sara M. Aschmann; Janet Arey; Roger Atkinson 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English ⚖ 707 KB

Using a relative rate method, rate constants for the gas-phase reactions OF the NO, radical with methacrolein and methyl vinyl ketone were determined to be ( 4 4 2 1.7) X cm' molecule-' s-' and < 6 X cm3 molecule-' S S ' , respectively, at 296 ? 2 K. The molar formation yields of rnethacrolein and m

Determination of the rate constants for

Determination of the rate constants for the reactions of CFCl2O2 radical with NO and NO2 by laser photolysis and time resolved mass spectrometry

✍ R. Lesclaux; F. Caralp 📂 Article 📅 1984 🏛 John Wiley and Sons 🌐 English ⚖ 560 KB

The rate constants for reactions (4) and (5) ( 4 ) CFCI,O, 7 NO -+CFCI,O + NO, ( 5 ) CFCI,O, + NO, + M -CFCI,O,NO, -M were determined at room temperature by pulsed laser photolysis and time resolved mass spectrometry. A description of the experimental setup is given. CFCI,O, radicals were generated