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

Journal Article · Sat Oct 01 00:00:00 EDT 1994 · Solvent Extraction and Ion Exchange; (United States)

DOI:https://doi.org/10.1080/07366299408918247· OSTI ID:6492102

Nakamura, Takashi; Miyake, Chie ^[1]

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1. 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), Vol. 12:5; ISSN 0736-6299
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
RARE EARTH COMPLEXES
NUCLEAR MAGNETIC RESONANCE
SOLVENT EXTRACTION
CATIONS
CHEMICAL BONDS
CMPO
COMPILED DATA
LIGANDS
MATHEMATICAL MODELS
NITRATES
CHARGED PARTICLES
COMPLEXES
DATA
EXTRACTION
INFORMATION
IONS
MAGNETIC RESONANCE
NITROGEN COMPOUNDS
NUMERICAL DATA
OXYGEN COMPOUNDS
PHOSPHINE OXIDES
PHOSPHINES
PHOSPHORUS COMPOUNDS
RESONANCE
SEPARATION PROCESSES
400702* - Radiochemistry & Nuclear Chemistry- Properties of Radioactive Materials
400105 - Separation Procedures
990200 - Mathematics & Computers
400102 - Chemical & Spectral Procedures