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Evaluation of reaction rate constants in media where they show dispersion: Hydrogen abstraction by methyl radicals in a methanol glass

✍ Scribed by T. Doba; K.U. Ingold; W. Siebrand

Publisher: Elsevier Science
Year: 1984
Tongue: English
Weight: 357 KB
Volume: 103
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(84)80316-4

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✦ Synopsis

Non-exponential decay of photochemically produced akyl radicals in organic glasses is analyzed in terms of a disrrtbution of exponential decay rate constants arising from a distribution of hydrogen transfer distances.

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Hydrogen atom abstraction by methyl radi

Hydrogen atom abstraction by methyl radicals in methanol glasses at 15–100 K: evidence for a limiting rate constant below 40 K by quantum-mechanical tunneling

✍ Reggie L. Hudson; Masaru Shiotani; Ffrancon Williams 📂 Article 📅 1977 🏛 Elsevier Science 🌐 English ⚖ 378 KB

Rate constants for hydrogen atom abstraction by methyl radicals in methanol glasses have been measured from 100 to 15 K. The Arrhenius plot is nonlinear and the reaction rate constant appears to reach a limiting value below 40 K. The r+ suits are discussed in terms of simple models for quantum-mecha