有機試薬としてのチアゾール誘導体に関する研究 (第4報)

Abstract

Twenty-three kinds of hydrazine derivatives of thiazole were synthesized and their utility as organic reagent was examined. Characteristic coloration was found to occur by the reaction of 2, 2′-hydrazodithiazole and 2-hydrazinothiazole derivatives with Fe (III), Cu (II), Ag (I), Hg (II), Pt (IV), Au (III), and Pd (II) ions, 2, 2′-azodithiazole derivatives with Pd (II) ion alone, 2-(2-acetylhydrazino)thiazole derivatives with Co (II), Ni (II), Mn (II), Fe (III), Cu (II), Ag (I), Hg (II), Au (III), and Pd (II) ions, 2-(2, 2-diacetylhydrazino)thiazole and 2-(1, 2, 2-triacetylhydrazino)thiazole derivatives with Au (III) and Pd (II) ions, benzaldehyde 2-benzothiazolylhydrazone derivatives with Co (II), Ni (II), Cd (II), Cu (II), Ag (I), Hg (II), Au (III), and Pd (II) ions, and 1-(2-benzothiazolyl)-4-phenyl-3-thiosemicarbazide derivatives with Co (II), Cu (II), Bi (III), Au (III), Pd (II), and Pb (II). Limit of detection of these metal ions by these reagents was examined by spot test and examinations were also made on interfering ions and their removal. It was thereby found that 2-hydrazino-4-phenylthiazole was excellent spot test reagent for Cu (II) ion, 2-(2-acetylhydrazino)-4-methylthiazole for Fe (III) ion, and 2, 2′-azobis(4-methylthiazole) for Pd (II) ion.