title: Polarographic study of the substitution reactions of the chelates of triethyl-enetetraminehexa-acetic acid-I Reaction of the zinc chelate with calcium ions.
abstract: The mechanism of the substitution reaction between the binuclear zinc-triethylenetetraminehexa-acetic acid (TTHA) chelate (Zn(2)X(2-)) and calcium ions was studied by the polarographic technique. The results obtained under equilibrium and kinetic conditions permitted formulation of the reaction mechanisms as depending on the ratio Zn:Ca in the system studied. The reaction studied proceeds only in the presence of ammonia. When calcium is replaced with a metal which has a TTHA chelate more stable than Zn(2)X(2-), the mixed binuclear chelate is not formed.
authors.affiliation: Heyrovsky Polarographic Institute, Czechoslovak Academy of Sciences, Prague, Czechoslovakia.
authors.forename: M
authors.initials: M
authors.lastname: Kopanica