Potentiometric inv estigation of pyridine-۲,۶-dicarboxylic acid an d chelidamic acid - ۲,۹-Dimethyl- ۱,۱۰-Phen anthroli ne compl exes with some m etal ions and comparing w ith solid state results

The pro tonation co nstants of chelidamic acid(chel), Pyridine-۲,۶-dicarboxylic acid(p ydc) and ۲,۹-Di methyl-۱,۱۰-Phenanthroline(dmp), in all of the probability protonated forms, the equilibr ium constants for th e chel-dmp and pyd c-dmp pro ton transf er system and the stoichio metry and stability c onstant of the complexation of t his system with Co۲+, Zn۲+ in aqueous solution w ere investigated by p otentiometric pH titration method. The stoich iometry of the most complex species in solution were compared with correspondi ng crystalli ne metal ion com plexes.

کلیدواژه ها:

Zinc ، Cobalt ، Pyridine-۲ ، ۶-dicarboxylic acid ، ۲ ، ۹-D imethyl-۱ ، ۱۰-phenanthroline ، Chelida mic acid.