Thermodynamic dissociation constants of N-phenylbenzohydroxamic acids and benzohydroxamic acid.
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.
Agrawal
Y K
YK
Department of Chemistry Govt. Science College Raipur (M.P., India.
Tandon
S G
SG