NMR spectroscopic study of adduct formation of neptunium(IV). beta. -diketonates

Journal Article · Fri Jul 01 04:00:00 EDT 1988 · Sov. Radiochem. (Engl. Transl.); (United States)

OSTI ID:6047065

Grebenshchikov, N R; Sidorenko, G V; Suglobov, D N; Shcherbakova, L L

Neptunium(IV) pivaloyltrifluoroacetonate Np(PTFA)/sub 4/, its adduct with trimethylphosphine oxide (TMPO), neptunium(IV) hexafluoroacetylacetonate Np(HFA)/sub 4/, and its adducts with TMPO and trimethyl phosphate (TMP) were synthesized. It was shown by NMR spectroscopy that adducts of Np(PTFA)/sub 4/ with TMPO and Np(HFA)/sub 4/ with TMP have a 1:1 composition; moreover, there is no coordination of subsequent molecules of the neutral ligand when it is present in excess. In the system Np(HFA)/sub 4/=TMPO, on the contrary, the formation of 1:1, 1:2, and 1:3 adducts is observed; moreover, in the last two cases there is an opening of the chelate rings with maintenance of a coordination number of 9 for neptunium. Thus, the ability of NP(IV) ..beta..-diketonates for adduct formation increases sharply as the basicity of the ..beta..-diketonates anion is weakened (the previously studied perfluorinated chelate - neptunium(IV)dipivaloylmethanate - does not form adducts at all).

• OSTI ID: 6047065
• Journal Information: Sov. Radiochem. (Engl. Transl.); (United States), Journal Name: Sov. Radiochem. (Engl. Transl.); (United States) Vol. 29:6; ISSN SVRDA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105 -- Separation Procedures
400201* -- Chemical & Physicochemical Properties
ACTINIDE COMPLEXES
ADDUCTS
CHELATES
CHEMICAL REACTIONS
CHEMICAL SHIFT
COMPLEXES
COMPLEXOMETRY
DEUTERIUM COMPOUNDS
ELECTRON SPIN RESONANCE
ESTERS
EXTRACTION
FLUORINATION
FLUORINE 19
FLUORINE ISOTOPES
HALOGENATION
HYDROGEN 1
HYDROGEN COMPOUNDS
HYDROGEN ISOTOPES
ISOTOPES
KETONES
LIGANDS
LIGHT NUCLEI
MAGNETIC RESONANCE
METHYLENE CHLORIDE
MOLECULAR STRUCTURE
NEPTUNIUM COMPLEXES
NMR SPECTRA
NUCLEI
ODD-EVEN NUCLEI
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
PHOSPHORIC ACID ESTERS
QUANTITY RATIO
RESONANCE
SEPARATION PROCESSES
SOLVENT EXTRACTION
SPECTRA
STABLE ISOTOPES
SYNTHESIS
TRANSURANIUM COMPLEXES