Date of Award


Document Type


Degree Name

Master of Science




The chelating agent 1, 3-bis(2-hydroxyethylamino)-2-propanol dihydro­chloride was prepared and preliminary examinations of the Cu(ll) and Fe(lll) complexes were carried out spectrophotometrically. This dihydrochloride as well as 1, 3 bis(tris(hydroxymethyl)methylamino)-2-propanol dihydrochloride. were converted from the chloride salts to their corresponding ammonium bases. The conversion was carried out by passing an aqueous solution of each chloride salt through an ion exchange column containing Amberlite XE-78 resin.

Solutions of these bases were standardized for use in potentiometric titration&. Each ammonium base was titrated with standard perchloric acid at 20°C, 30°C, and 40°C. The dissociation constants. were calculated using these data. Aqueous solutions of Cu(Il) at low pH were titrated with the standardized ammonium bases at 20°C, 30°C and 40°C. These data were used to calculate the stability constants of the Cu(Il) complexes.

Comparisons of the two copper chelates were made with respect to their thermodynamic properties calculated from the stability constants. Possible structures of the copper (ll) complexes are proposed.

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