title: Acid-Base Equilibria in Nonpolar Media. 1. A Spectrophotometric Method for Acidity Measurements in Heptane.
abstract: A UV-vis spectrophotometric method for measurements of relative acidities in heptane has been developed. The phosphazene base t-BuP(4) is used as the deprotonating agent. Its protonated form is a good counterion for the anions of the acids because it is bulky, has delocalized charge, and therefore does not have specific interactions with the anions. A self-consistent scale of relative acidities in heptane spanning for 3 pK(a) units has been constructed.
authors.affiliation: Department of Chemistry, Tartu University, EE2400 Tartu, Estonia, Chemisches Laboratorium, Institut für Organische Chemie und Biochemie, Universität Freiburg, Albertstrasse 21, D-79104 Freiburg, Germany, and Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, Novosibirsk 630090, Russia.
authors.forename: Ivo
authors.initials: I
authors.lastname: Leito
authors.forename: Toomas
authors.initials: T
authors.lastname: Rodima
authors.forename: Ilmar A.
authors.initials: IA
authors.lastname: Koppel
authors.forename: Reinhard
authors.initials: R
authors.lastname: Schwesinger
authors.forename: Vladislav M.
authors.initials: VM
authors.lastname: Vlasov