Substituent effect on dissociation constants of 5-(substituted styryl)tropolones

The dissociation constants of 6-substituted 3-hydroxy-4-pyrones and trans-6-(substituted styryl)-3-hydroxy-4-pyrones were measured spectrophotometrically in 50% aqueous methanol at 25 °C. The results are correlated to the substituent constants σ, the following equations being obtained: pKa=8.57–1.53 σ and pKa=8.54–0.23 σ. The transmission coefficient through the styryl group was found to be 0.150 for the 3-hydroxy-6-styryl-4-pyrone system.

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Substituent effect on dissociation constants of 5-(substituted styryl)tropolones

Cited by 4 publications

References 7 publications

Substituent Effects on Dissociation Constants of 4-and 6-Styryl-2-aminotropones

Substituent Effects on Dissociation Constants of 4-and 6-Styryl-2-aminotropones

Substituent Effect on the Dissociation Constants of 5-(Substituted Styryl)-2-aminotropones

Substituent Effects on Dissociation Constants of trans-3-Hydroxy-6-styryl-4-pyrones

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