Evaluation of two new asymmetric derivatives of thiocarbohydrazide as spectrophotometric analytical reagents.
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.
Alvarez
F
F
Department of Analytical Chemistry, Faculty of Chemistry, University of Sevilla, 41012-Sevilla, Spain.
de Pablos
F
F
Gomez Ariza
J L
JL