title: Evaluation of two new asymmetric derivatives of thiocarbohydrazide as spectrophotometric analytical reagents.
abstract: The synthesis and analytical properties of 1-(2-pyridylmethylideneamino)-3-(4-hydroxybenzylideneamino)thiourea PHT and 1-(2-pyridylmethylideneamino)-3-(2,4-dihydroxybenzylideneamino)-thiourea PDT have been studied. A spectrophotometric method has been used to determine the protonation constants of the reagents and a spectrophotometric survey of the reactions of various cations with PHT and PDT has been made.
authors.affiliation: Department of Analytical Chemistry, Faculty of Chemistry, University of Sevilla, 41012-Sevilla, Spain.
authors.forename: F
authors.initials: F
authors.lastname: Alvarez
authors.forename: F
authors.initials: F
authors.lastname: de Pablos
authors.forename: J L
authors.initials: JL
authors.lastname: Gomez Ariza