title: Protonation Equilibrium of 4-Substituted Benzohydroxamic Acids in Mineral Acids.
abstract: The protonation equilibria of some 4-substituted benzohydroxamic acids 4-X(C(6)H(4)CONHOH) (X = H, OMe, Cl) have been investigated in aqueous sulfuric, perchloric, and hydrochloric acids at 25 degrees C UV spectrophotometrically. The Hammett acidity function method, the Bunnett-Olsen method, Cox-Yates excess acidity function method, and Marziano-Cimino-Passerini method have been compared in order to rationalize the differences observed between pK(BH)()+ values determined by each method. An attempt has been made to apply multivariate analysis to separate the effect of protonation from the medium effect for benzohydroxamic acid.
authors.affiliation: School of Studies in Chemistry, Pt. Ravishankar Shukla University, Raipur 492 010, India.
authors.forename: Kallol K.
authors.initials: KK
authors.lastname: Ghosh
authors.forename: Pankaj
authors.initials: P
authors.lastname: Tamrakar
authors.forename: Surendra K.
authors.initials: SK
authors.lastname: Rajput