Published 1996
| Version v1
Journal article
31P-NMR study of the organo phosphorous complexes of uranium(VI). I. The intermolecular ligand exchange kinetics in uranyl nitrate complexes with TBP and TOPO
- 1. Central Inst. of Physics, Bucharest (Romania). Inst. of Physics and Nuclear Engineering
Description
The intermolecular ligand exchange in uranyl nitrate complexes with TBP and TOPO is studied by 31P-NMR. The constant rates at 25 deg C in CCL4 are: (8.47 ± 1.86) x 103 s-1 for U-TBP and (1.3 ± 0.04) x 104M-1x s-1 for U-TOPO system. The very similar activation parameters values of the ligand exchange suggest the same mechanism for both systems, namely an one-step interchange mechanism. The differences between the systems regarding the rate equations and the extraction properties are discussed. (author). 10 refs., 6 figs., 3 tabs
Additional details
Publishing Information
- Journal Title
- Journal of Radioanalytical and Nuclear Chemistry
- Journal Volume
- 203
- Journal Issue
- 1
- Journal Page Range
- p. 177-187.
- ISSN
- 0236-5731
- CODEN
- JRNCDM
INIS
- Country of Publication
- Hungary
- Country of Input or Organization
- Hungary
- INIS RN
- 27040400
- Subject category
- S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; S38: RADIATION CHEMISTRY, RADIOCHEMISTRY AND NUCLEAR CHEMISTRY; S11: NUCLEAR FUEL CYCLE AND FUEL MATERIALS;
- Descriptors DEI
- CHEMICAL REACTION KINETICS; ION EXCHANGE; LIGANDS; NMR SPECTRA; NUCLEAR MAGNETIC RESONANCE; PHOSPHORUS 31; SOLVENT EXTRACTION; TBP; TOPO; URANIUM COMPLEXES; URANYL NITRATES
- Descriptors DEC
- ACTINIDE COMPLEXES; ACTINIDE COMPOUNDS; BUTYL PHOSPHATES; COMPLEXES; ESTERS; EXTRACTION; ISOTOPES; KINETICS; LIGHT NUCLEI; MAGNETIC RESONANCE; NITRATES; NITROGEN COMPOUNDS; NUCLEI; ODD-EVEN NUCLEI; ORGANIC COMPOUNDS; ORGANIC PHOSPHORUS COMPOUNDS; OXYGEN COMPOUNDS; PHOSPHINE OXIDES; PHOSPHORIC ACID ESTERS; PHOSPHORUS ISOTOPES; REACTION KINETICS; RESONANCE; SEPARATION PROCESSES; SPECTRA; STABLE ISOTOPES; URANIUM COMPOUNDS; URANYL COMPOUNDS