title: Asymmetric derivatives of carbohydrazide and thiocarbohydrazide as analytical reagents.
abstract: The synthesis and analytical properties of two asymmetric derivatives of carbohydrazide and thiocarbohydrazide with pyridine and phenol have been studied. The compounds tested are 1-(2-pyridylmethylideneamino)-3-(salicylideneamino)urea and 1-(2-pyridylmethylideneamino)-3-(salicylideneamino) thiourea. The analytical utility of these reagents is outlined. A spectrophotometric method for determining the formation constants of the complexes is described.
authors.affiliation: Department of Analytical Chemistry, Faculty of Chemistry, University of Seville, Seville -4, Spain.
authors.forename: D
authors.initials: D
authors.lastname: Rosales
authors.forename: G
authors.initials: G
authors.lastname: Gonzalez
authors.forename: J L
authors.initials: JL
authors.lastname: Ariza