title: Determination of autoprotolysis constants of some non-aqueous solvents using coulometric titration.
abstract: Autoprotolysis constants of acetonitrile, propionitrile, nitromethane, ethylene carbonate and dimethyl sulphoxide were determined using a coulometric - potentiometric method with a hydrogen/palladium electrode as generator. The method is based on the titration of a strong base, tetrabutylammonium hydroxide, with H(+) ions generated by anodic oxidation of hydrogen dissolved in palladium. The titration was carried out in a galvanic cell with glass and calomel electrodes at 25 degrees C. The pK(s) values for the investigated solvents are: acetonitrile, 28.8; propionitrile, 24.6; nitromethane, 23.7; ethylene carbonate. 21.5; and dimethyl sulphoxide 29.1. These data are in accordance with those reported in the literature.
authors.forename: R
authors.initials: R
authors.lastname: Mihajlović
authors.forename: Z
authors.initials: Z
authors.lastname: Simić
authors.forename: L
authors.initials: L
authors.lastname: Mihajlović
authors.forename: M
authors.initials: M
authors.lastname: Vukićević