STABILITY CONSTANTS OF THE RARE EARTH CHELATE SPECIES FORMED WITH SOME MONOCARBOXYLATE LIGANDS

Journal Article · Wed Apr 01 04:00:00 EST 1964 · Inorganic Chemistry (U.S.)

OSTI ID:4041953

Powell, J E; Kolat, R S; Paul, G S

Formation constants of the first two chelate species formed by rare earth and yttrium ions with propionate, methoxy acetate, and thioglycoate ligands were determined by a potentiometric method at 20 deg C and an ionic strength of 0.10. The supporting electrolyte was sodium perchlorate. The data indicate that methoxyacetate and thioglycolate ( alpha mercaptoacetate) ligands behave essentially as monodentate ligands, as do acetate and propionate. It is apparent that the affinity of the simple carboxylic acid ligands for rare earth ions decreases in the order acetate > propionate > isobutyrate. It is also clear that the order of the electrondonating ability of the functional groups studied is OH >> OCH/sub 3/ > SH. The ionization constants of propionic, methoxyacetic, and thioglycolic acids were determined at 20 deg C and an ionic strength of 0.10. (auth)

• Research Organization: Ames Lab., Ames, Iowa
• NSA Number: NSA-18-017859
• OSTI ID: 4041953
• Report Number(s): IS-755; 0020-1669
• Journal Information: Inorganic Chemistry (U.S.) , Journal Name: Inorganic Chemistry (U.S.) Vol. Vol: 3; ISSN INOCA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ACETIC ACID
ACIDITY
ALKANES
BUTANE
CATIONS
CHELATES
CHEMICAL REACTIONS
CHEMISTRY
COMPLEXES
DECOMPOSITION
ELECTRIC POTENTIAL
ELECTROCHEMISTRY
ELECTROLYTES
ETHANE
GLYCOLIC ACID
IONS
ISOBUTYRIC ACID
ISOMERS
MEASURED VALUES
METHANE
METHOXY RADICALS
ORGANIC ACIDS
ORGANIC SULFUR COMPOUNDS
PROPANE
PROPIONIC ACID
QUANTITY RATIO
RARE EARTHS
YTTRIUM COMPLEXES
YTTRIUM COMPOUNDS