Six bis(dimethylphenyl) analogues of dithizone are prepared, characterized and their reactions with metal ions in a two phase system are reported. The extraction equilibria of their complexes with Cd(II), Co(II), Hg(II), Pb(II), Tl(I), Zn(II), and Bi(III) as well as their spectral characteristics are described. Complete extraction of these metal chelates requires higher pH’s than those needed for the unsubstituted dithizone. The molar absorptivities of Bi(III) complexes with bis(3,4-dimethylphenyl)-, and bis(3,5-dimethylphenyl) analogues are higher than the corresponding value of Bi(III) dithizonate. The molar absorptivities of Cu(II) and Hg(II) (in CCl4) complexes with bis(3,5-dimethylphenyl) analogue are also higher than the corresponding values of the unsubstituted dithizone complexes.
本研究制备了六种双(二
甲基苯基)二
硫酮类似物,对其进行了表征,并报告了它们在双相体系中与
金属离子的反应。报告描述了它们与 Cd(II)、Co(II)、Hg(II)、Pb(II)、Tl(I)、Zn(II) 和 Bi(III) 复合物的萃取平衡及其光谱特征。完全萃取这些
金属螯合物所需的 pH 值要高于未取代的二
硫酮所需的 pH 值。双(3,4-二
甲基苯基)和双(3,5-二
甲基苯基)类似物的 Bi(III)络合物的摩尔吸收率高于二
硫酮 Bi(III)的相应值。
铜(II)和
汞(II)(在
CCl4 中)与双(3,5-二
甲苯基)类似物的摩尔吸收率也高于未取代的二
硫酮配合物的相应值。