Abstract
Maximum absorption wavelengths and molar extinction coefficients of o-iodo, p-iodo, o-iodo-p-methyl, and o-methyl-p-iodo derivatives of dithizone, and their metal complexes were measured for their carbon tetrachloride solutions, and it was found that these changes in chemical constitution were accompanied with a certain regularity in the variations of those absorption characteristics. This regularity was found to be quite the same as that found in the case of bromo and methyl-bromo derivatives in the preceeding report.
The reactivities of eath reagent with metal ions as well as the extraction coefficients of their Hg2+ and Cu2+ complexes indicated that the most prominent factor the change of reactivities of dithizone derivatives was the position of the introduced functional groups, and the methyl group in o-position had the greatest influence. However, the induction effect of an introduced group on the reactivity was not so clear.
