1978
DOI: 10.1021/jo00399a001
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Relative rate constants for hydrogen atom abstraction by the cyclohexanethiyl and benzenethiyl radicals

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Cited by 43 publications
(21 citation statements)
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“…4) (157,191). Although hydrogen atom transfer to carbon-centered radicals is a diffusion-controlled reaction, the extremely low concentrations of H 2 S and H 2 S x in blood and tissues limit their efficiency at repairing free radical damage to biomolecules (145).…”
Section: Diabetes and Metabolismmentioning
confidence: 99%
See 1 more Smart Citation
“…4) (157,191). Although hydrogen atom transfer to carbon-centered radicals is a diffusion-controlled reaction, the extremely low concentrations of H 2 S and H 2 S x in blood and tissues limit their efficiency at repairing free radical damage to biomolecules (145).…”
Section: Diabetes and Metabolismmentioning
confidence: 99%
“…Simple species containing an SH group such as H 2 S, HS-, HS-SH, and HSS-excel at undoing the damage inflicted to biomolecules by free radicals through hydrogen atom donation to carbon-centered radicals (157,191). Although hydrogen atom transfer to carbon-centered radicals is a diffusion-controlled reaction, the extremely low concentrations of H 2 S and H 2 Sx in blood and tissues limit their efficiency at repairing free radical damage to biomolecules.…”
Section: Fig 4 Hydrogen Atom Donation To Carbon-centered Radicalsmentioning
confidence: 99%
“…Vor dem Hintergrund der relevanten Bindungsdissoziationsenthalpien (BDE) erweist sich dieser Prozess als leicht exotherm, da typische BDE‐Werte für nicht‐aromatische S‐H‐Einheiten im Bereich von 86–87 kcal mol −1 liegen, wohingegen beispielsweise derjenige von Benzylmethylether lediglich bei 85.8 kcal mol −1 liegt . Pryor und Mitarbeitende konnten in diesem Zusammenhang zeigen, dass eine HAT‐Reaktion zwischen Benzylmethylether und einem Thiylradikal kinetisch begünstigt ist und eine Geschwindigkeitskonstante von etwa 2×10 7 m −1 s −1 aufweist . Die geringe Aktivierungsbarriere für derartige HAT‐Prozesse lässt sich nach Roberts et al.…”
Section: Funktionalisierungen Von Element‐wasserstoff‐bindungenunclassified
“…Hydrogen abstraction by thiyl radicals from organic substrates had been documented decades ago [48, 49], and thiols had been added to synthetic processes to facilitate hydrogen transfer via “polarity reversal catalysis” [50, 51]. Here, a primary organic radical (R 1 • ) abstracts a hydrogen from a thiol, yielding a thiyl radical, which, in turn, reacts via hydrogen abstraction with a second organic substrate, R 2 -H. The net reaction is hydrogen transfer between R 1 • and R 2 -H, catalyzed by the thiol.…”
Section: Hydrogen Transfer Reactions Of Thiyl Radicalsmentioning
confidence: 99%