Abstract
The acid dissociation constants of hydroxyphenazine derivatives having the oxine-like functional group and the formation constants of their metal chelates with cobalt [II], nickel [II], copper [II], zinc [II] and cadmium [II] were measured in a 50% (v/v) ethanol solution at 25±1° by the spectrophotometry. Considering from the formation constants of Ni- and Zn-chelates, it was found that the metal chelates of hydroxyphenazine derivatives indicated the similar steric hindrance to those of the 2-substituted oxine metal chelates.
