✦ LIBER ✦

UV absorption spectrum and kinetics of the self-reaction of neopentyl radicals in the gas phase at 298 K

✍ Scribed by Ole J. Nielsen; Thomas Ellermann; Timothy J. Wallington

Publisher: Elsevier Science
Year: 1993
Tongue: English
Weight: 394 KB
Volume: 203
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(93)85405-d

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✦ Synopsis

Neopentyl radicals were produced via the reaction F+ ( CH3)&-r (CH,)sCCH2 t HF, which was initiated by pulse radiolysis of neopentane/SF, gas mixtures at 298 K. The ultraviolet absorption spectrum of neopentyl radicals has been recorded over the wavelength range 220-270 nm. An absorption cross section, ~(c~,)~c~* (240 nm) -(4.88 + 0.42) x lo-'* cm2 molecule-', has been obtained based on absolute yields using CHaOZ as a reference. The decay of neopentyl radicals was found to follow secondorder kinetics in accordance with the self-reaction 2( CH,),CCHZ -products, with an absolute bimolecular rate constant of (2.lfO.Z)XiO-"cm'molecuie-'s-'(f2o).

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