Synthesis of Thiocatechols and Acid Dissociation Constants

[摘要] New chelating ligands, thiocatechol and p-chlorothiocatechol, have been synthesized and the acid dissociation constants were determined by potentiometric method in 50% dioxane-water; pK1 and pK2 were 7.28, 10.97 for thiocatechol and 6.37, 10.22 for p-chlorothiocatechol, respectively. Color reactions with various metal ions were studied. It was found that the above ligands are specific for Bi(¥²), Mo(¥µ) and W(¥µ) as an analytical reagent.

[学科分类] 化学（综合）