Výsledky vyhledávání - "David V, Avila"

Perfluoro-tert-butyl, a reactive, neutral, electrophilic carbon-centered radical par excellence

Autor: William R. Dolbier, David V. Avila, H.‐Q. Pan, J. Lusztyk, K. U. Ingold

Publikováno v: Tetrahedron. 52:12351-12356

Absolute rate constants for (CF3)3C• addition to terminal olefins increase by roughly a factor of 30 for every 1 eV decrease in the ionization potential (IP) of the alkene. A similar decrease in IP increases the rate of addition of CF3• and n-C3F

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2941e75264ae1b0ef4c1d0efc8b63cb8
https://doi.org/10.1016/0040-4020(96)00742-9

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Reaction of Phenyl-Substituted o-Quinodimethanes with Nitric Oxide. Are Benzocyclobutenes Suitable Precursors for Nitric Oxide Cheletropic Traps?

Autor: David V. Avila, Hans Gert Korth, Thomas Paul, Reiner Sustmann, Mohammed A. Hassan

Publikováno v: The Journal of Organic Chemistry. 61:6835-6848

In order to elucidate the potential of substituted o-quinodimethanes as reagents for the trapping of nitric oxide (NO) in biological systems, the reaction of alkoxyl- and alkyl-substituted 7,8-diphenyl- and 7,7,8-triphenyl-o-quinodimethanes with nitr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::80cbc1f168ae1428d0bcde9a1606232b
https://doi.org/10.1021/jo960573n

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Absolute Rate Constants for Radical Additions to Alkenes in Solution. The Synergistic Effect of Perfluorination on the Reactivities of n-Alkyl Radicals1

Autor: H.-Q. Pan, David V. Avila, J. Lusztyk, K. U. Ingold, William R. Dolbier

Publikováno v: The Journal of Organic Chemistry. 61:2027-2030

Laser flash photolysis has been used to determine the absolute rate constants for addition of several partially fluorinated n-alkyl radicals to three styrenes at 25 °C in Freon 113. Fluorination at the γ-position (RCF2CH2CH2•) gives radicals with

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::085b05204dd5e54a16360b889796c30a
https://doi.org/10.1021/jo951782v

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Electronic Absorption Spectra of Some Alkoxyl Radicals. An Experimental and Theoretical Study

Autor: Janusz Lusztyk, K. U. Ingold, Ariel A. Di Nardo, David V. Avila, Francesco Zerbetto, Marek Z. Zgierski

Publikováno v: Journal of the American Chemical Society
Journal of the American Chemical Society, American Chemical Society, 1995, 117 (10), pp.2711-2718. ⟨10.1021/ja00115a005⟩

The visible and UV absorptions of a variety of alkoxyl radicals have been examined by experiment and theory. In most solvents, the tert-butoxyl radical shows only a weak "tail-end" absorption in the UV region of the spectrum and no absorption in the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::86658775611757c8b2d28578cd95927a
https://doi.org/10.1021/ja00115a005

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Absolute rate constants for some reactions of perfluoro-n-alkyl radicals in solution

Autor: David V. Avila, Janusz Lusztyk, K. U. Ingold, William R. Dolbier, H.‐Q. Pan, M. Muir

Publikováno v: Journal of the American Chemical Society. 116:99-104

Absolute rate constants have been measured at 298 ± 2 K for some reactions of C2F5·, n-C3F7·, n-C7F15·, and n-C8F17· by time- resolved (laser flash photolysis) and competition kinetics. The last three of these radicals exhibit essentially equal

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e3cbdf65e2e9a07549b851cd59d5fb2d
https://doi.org/10.1021/ja00080a012

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Rate of reaction of phenyl radicals with oxygen in solution and in the gas phase

Autor: Janusz Lusztyk, K. U. Ingold, Robert Louw, Paul M. Sommeling, Peter Mulder, David V. Avila

Publikováno v: The Journal of Physical Chemistry. 97:8361-8364

The rate constant for the title reaction, k1, is 3.8 × 109 M-1 s-1 in water at 298 K and is ≥ 108 M-1 s-1 in the gas phase at 603 K. It is concluded that two reports8,11 that this reaction is very slow in the gas phase, k1 ≤ 1.2 × 104 and ∼2.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::22f89e471d4132fae26882e72457d4c5
https://doi.org/10.1021/j100134a001

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