title: Thermodynamic dissociation constants of N-phenylbenzohydroxamic acids and benzohydroxamic acid.
abstract: Thermodynamic association constants of benzohydroxamic acid and several ortho-substituted N-phenylbenzohydroxamic acids have been determined by pH titration in aqueous dioxan media at 25 degrees and 35 degrees . Empirical pH corrections for mixed aqueous media have been applied. The pK(a) values do not vary linearly with the reciprocal of dielectric constant of the medium, but a plot of pK(a) vs. the mole fraction of dioxan is linear at a given temperature. Values of DeltaG degrees , DeltaH degrees and DeltaS degrees are tabulated.
authors.affiliation: Department of Chemistry Govt. Science College Raipur (M.P., India.
authors.forename: Y K
authors.initials: YK
authors.lastname: Agrawal
authors.forename: S G
authors.initials: SG
authors.lastname: Tandon