1990
DOI: 10.1139/v90-082
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Kinetics of the reduction of the tropylium and xanthylium cations by 1,4-dihydropyridine derivatives

Abstract: , 537 (1990). The pH-dependences of the apparent second-order rate constants (k2PP) for the reduction of 2,4,6-cycloheptatrien-1-01 and 9-xanthydrol by each of 1-benzyl-1,4-dihydronicotinamide (BNH) and 10-methyl-9,lO-dihydroacridine (MAH) have been measured in 20% acetonitrile -80% water, at 25OC and ionic strength 1.0. For each of these reactions, the pH-dependence of kyp is only consistent with reduction occurring via the aromatic cation (either tropyliurn or xanthylium) that is present in equilibrium with … Show more

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Cited by 9 publications
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“…The pH-dependent second-order rate constants were evaluated from eq 6 If K R + ≫ [H + ], eq 6 simplifies to k 2 app = k 2 [H + ]/ K R + , i.e., The second-order rate constants obtained from eq 7 are summarized in Table .…”
Section: Resultsmentioning
confidence: 99%
“…The pH-dependent second-order rate constants were evaluated from eq 6 If K R + ≫ [H + ], eq 6 simplifies to k 2 app = k 2 [H + ]/ K R + , i.e., The second-order rate constants obtained from eq 7 are summarized in Table .…”
Section: Resultsmentioning
confidence: 99%