NMR study of lanthanide(III) nitrate-CMPO extraction system. (II) Molecular movement of CMPO and La(III)(NO[sub 3])[sub 3]-CMPO complex and ligand-exchange reaction for Eu(III)-CMPO and Gd(III)-CMPO systems
- Osaka Univ. (Japan)
NMR measurements carried out to study the molecular movement of CMPO and La(III)(NO[sub 3])[sub 3]-CMPO complex and the ligand-exchange reaction for Eu(III) and Gd(III)-CMPO systems indicate that the carbonyl and phosphoryl group participate in the bonding between CMPO and La[sup 3+] ion. The numbers of CMPO molecules coordinated to Eu[sup 3+] and Gd[sup 3+] ions in CDCl[sub 3] solution were estimated to be 3 and 2, respectively, in the presence of excess CMPO. The activation parameters for the ligand-exchange reaction are [Delta] H = 37.8[+-]1.9 kJ/mol, [Delta] S = -59.9[+-]6.5 J/mol[center dot]K and [Delta] H = 41.3[+-]1.6 kJ/mol, [Delta] S = -44.1[+-]5.3 J/mol[center dot]K for Eu(III)-CMPO and Gd(III)-CMPO systems, respectively. 12 refs., 5 figs., 4 tabs.
- OSTI ID:
- 6492102
- Journal Information:
- Solvent Extraction and Ion Exchange; (United States), Journal Name: Solvent Extraction and Ion Exchange; (United States) Vol. 12:5; ISSN 0736-6299; ISSN SEIEDB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400102 -- Chemical & Spectral Procedures
400105 -- Separation Procedures
400702* -- Radiochemistry & Nuclear Chemistry-- Properties of Radioactive Materials
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
CATIONS
CHARGED PARTICLES
CHEMICAL BONDS
CMPO
COMPILED DATA
COMPLEXES
DATA
EXTRACTION
INFORMATION
IONS
LIGANDS
MAGNETIC RESONANCE
MATHEMATICAL MODELS
NITRATES
NITROGEN COMPOUNDS
NUCLEAR MAGNETIC RESONANCE
NUMERICAL DATA
OXYGEN COMPOUNDS
PHOSPHINE OXIDES
PHOSPHINES
PHOSPHORUS COMPOUNDS
RARE EARTH COMPLEXES
RESONANCE
SEPARATION PROCESSES
SOLVENT EXTRACTION