Kinetics of typical hydrolysis reactions of multivalent cations

Journal Article · Thu Nov 15 04:00:00 EST 1973 · Chimia (Aarau), v. 27, no. 11, pp. 575-588

OSTI ID:4370105

Wendt, H

This review summarizes kinetic investigations concerning the homogeneous hydrolysis reactions of multivalent metal cations in aqueous solution. Three main types of reactions are discussed: a) protolysis of aquated cations to form mononuclear metal-hydroxo complexes; b) the formation and fission of binuclear mu -hydroxobridged or mu -oxo-bridged metal-hydroxo complexes; and, c) the formation and acid degradation reactions of higher polynuclear metal-hydroxo complexes. Whereas the protolysis reaction of aquo-metal cations is a simple and fundamental (acid dissociation) reaction the formation of the binuclear complexes resembles in most cases closely the metal-anion-complex formation. The formation and degradation of the higher metal-hydroxo complexes, however, mostly proceeds in two or more parallel reaction paths. Both the successive addition of mononuclear metal-hydroxo species to metal-hydroxo complexes of lower molecular weight as well as the initial formation of discrete sub-complexes which finally combine to the stable complex are observed for the formation reaction. (auth)

• Research Organization: Technische Hochschule, Darmstadt, Ger.
• NSA Number: NSA-29-012630
• OSTI ID: 4370105
• Journal Information: Chimia (Aarau), v. 27, no. 11, pp. 575-588, Journal Name: Chimia (Aarau), v. 27, no. 11, pp. 575-588; ISSN CHIMA
• Country of Publication: Country unknown/Code not available
• Language: German

Related Subjects

*THORIUM COMPOUNDS-- HYDROLYSIS
*URANIUM COMPOUNDS-- HYDROLYSIS
AQUEOUS SOLUTIONS
CATIONS
CHEMICAL REACTION KINETICS
DECOMPOSITION
N40420* --Chemistry--Radiochemistry & Nuclear Chemistry-- Properties of Radioactive Materials
THORIUM COMPLEXES
URANIUM COMPLEXES
URANYL COMPOUNDS
VALENCE