Abstract
Thermodynamic acid dissociation constants, T p K a , of seven β-diketones have been determined potentiometrically in aqueous and aqueous dioxane media at 25±0.1°C. The T p K a order of these reagents is: DBM>AcAc>BA>TFAA>TTA>BTFA>HFAA. T p K a values are found to vary linearly as a function of mole fraction of dioxane in all cases. The effect of different substituents on these constants is also discussed briefly.
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