A Potentiometric Study of Beta-Diketone Chelation Tendencies [Thesis]

Thesis/Dissertation · Tue Jan 09 23:00:00 EST 1951

OSTI ID:4423732

Van Uitert, LeGrand G. ^[1]

---

1. The Pennsylvania State College, University Park, PA (United States)

The methods of procedure of Calvin and Wilson for obtaining formation constants by potentiometric titrations have been substantiated. These methods have boon extended to water-dioxane solutions containing more than 50 volume-percent of dioxane. The interpretation of the pH data obtained in these titrations has been clarified. The effect of the ionic strength and the water-dioxane ratio upon the dissociation constants of the materials present in water-dioxane solutions has boon demonstrated. The dissociation constants of a series of beta-diketones in 75 volume-percent dioxane solutions have been measured and related to the formation constants of their respective copper chelate compounds. The existence of insoluble compounds of the general formula M⁺²(Ke)₂$$\bullet$$M⁺¹Ke$$\bullet$$dioxane, where Ke is the ionized acetylacetone molecule, has been demonstrated. This has been shown specifically for NiKe_2$$\bullet$$NaKe$$\bullet$$dioxane and ZnKe₂$$\bullet$$NaKe$$\bullet$$dioxane. The instability of trifluoro-beta-diketones in the presence of acid has been demonstrated

• Research Organization: The Pennsylvania State College, University Park, PA (United States)
• Sponsoring Organization: US Atomic Energy Commission (AEC)
• NSA Number: NSA-05-004088
• OSTI ID: 4423732
• Report Number(s): NYO--725
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ACETONE
ACETYLENES
ACIDITY
ACIDS
CHELATES
CHEMICAL REACTIONS
COPPER COMPOUNDS
DECOMPOSITION
DIOXANE
ELECTRIC POTENTIAL
IONIZATION
KETONES
MOLECULES
NICKEL COMPLEXES
ORGANIC FLUORINE COMPOUNDS
QUALITATIVE ANALYSIS
QUANTITY RATIO
REACTION KINETICS
SODIUM COMPLEXES
SOLUTIONS
SOLVENTS
STABILITY
TITRATION
WATER
ZINC COMPLEXES