Study of formation equilibria of the complexes of some metal cations with polyoxa macrocyclic ligands
The complexes formed by the Na/sup +/, K/sup +/, Rb/sup +/, Ca/sup 2 +/, UO/sub 2//sup 2 +/, and Ag/sup +/ cations with the macrocyclic polyethers 18-crown-6, benzo-15-crown-5, and dicyclohexyl-18-crown-6 are investigated. The stability constants of these complexes have been determined potentiometrically in (90% vol.) ethanol-water solutions at 25/sup 0/C and an ionic strength ..mu.. = 0.1 (achieved with tetrabutylammonium perchlorate). The stability of the investigated complexes was interpreted in terms of caging the metal cation into the cavity of the macrocyclic ligand, an effect which depends on the ratio of the diameter of the complexed cation over the diameter of the cavity of the complexing ligand.
- Research Organization:
- Polytechnic Institute of Bucharest, Romania
- OSTI ID:
- 5847294
- Journal Information:
- Anal. Lett.; (United States), Vol. 17:A17
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CALCIUM COMPOUNDS
CHEMICAL PREPARATION
POLYETHYLENE GLYCOLS
POTASSIUM COMPOUNDS
RUBIDIUM COMPOUNDS
SILVER COMPOUNDS
SODIUM COMPOUNDS
URANYL COMPOUNDS
CHEMICAL REACTION KINETICS
EXPERIMENTAL DATA
ACTINIDE COMPOUNDS
ALCOHOLS
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
DATA
GLYCOLS
HYDROXY COMPOUNDS
INFORMATION
KINETICS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC POLYMERS
POLYMERS
REACTION KINETICS
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
URANIUM COMPOUNDS
400700* - Radiochemistry & Nuclear Chemistry
400201 - Chemical & Physicochemical Properties
400301 - Organic Chemistry- Chemical & Physicochemical Properties- (-1987)