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Thesis (M.A.)—University of Nebraska—Lincoln, 1950. Department of Chemistry.


Copyright 1950, the author. Used by permission.


This investigation studied polarographic results obtained in the electroreduction of copper chelate derivatives of 2,4-pentanedione, 1-phenyl-1,3 butanedione, and 1,3-diphenyl-1,3-propanedione in several solvents.

This study produced the following results:

(1) Polarographic investigations of bis (2,4-pentanediono)-copper (II), bis (1,3-butanedino) copper (III), and bis (1,3-diphenyl-1,3-propanediono) copper (II) were made in water, fifty percent alcohol, fifty and seventy-five percent dioxane, and fifty percent pyridine solutions.

(2) The half-wave potentials of these compounds decrease with increasing size of chelating group and are affected by the solvent.

(3) The diffusion current constants in water and alcohol solutions decrease with increasing size of the chelating group. Variations in the trend occur in dioxane solutions.

(4) Pyridine solutions of these compounds are believed to give two waves. The first wave is difficult to evaluate because it merges with the anodic wave of mercury. Values are included, therefore, for the second waves only.

(5) Electroreduction of these compounds is an irreversible process.

Advisor: H. F. Holtzclaw, Jr.