/sup 237/Np Moessbauer spectra of neptunium(IV) tris(pyrazol-1-yl) borate compounds

Conference · Tue Jan 01 04:00:00 EST 1980

OSTI ID:7036799

Karraker, D. G.

The compounds Np(HBpz/sub 3/)/sub 2/Cl/sub 2/, Np(HBpz/sub 3/)/sub 2/(MeCp)/sub 2/, Np(HBpz/sub 3/)CpCl/sub 2/, and Np(HBpz/sub 3/)(MeCp)Cl/sub 2/ (pz = C/sub 3/H/sub 3/N/sub 2/, Cp = C/sub 5/H/sub 5/, MeCp = CH/sub 3/C/sub 5/H/sub 4/) have been prepared as tetrahydrofuran solvates and characterized by analysis. /sup 237/Np Moessbauer spectra showed magnetic splitting, except for Np(HBpz/sub 3/)/sub 2/(MeCp)/sub 2/. The spectra of Np(HBpz/sub 3/)CpCl/sub 2/ and Np(HBpz/sub 3/)MeCpCl/sub 2/ were distorted by intermediate relaxation effects. Isomer shifts of -0.6 cm/sec were found for both Np(HBpz/sub 3/)/sub 2/Cl/sub 2/ and Np(HBpz/sub 3/)/sub 2/(MeCp)/sub 2/, suggesting that the covalent contribution to bonding by MeCp in the latter compound is small.

• Research Organization: Du Pont de Nemours (E.I.) and Co., Aiken, SC (USA). Savannah River Lab.
• DOE Contract Number: AC09-76SR00001
• OSTI ID: 7036799
• Report Number(s): DP-MS-80-78; CONF-801226-1
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400702* -- Radiochemistry & Nuclear Chemistry-- Properties of Radioactive Materials
ACTINIDE COMPOUNDS
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ALPHA DECAY RADIOISOTOPES
AZOLES
BORATES
BORON COMPOUNDS
CHEMICAL PREPARATION
HEAVY NUCLEI
HETEROCYCLIC COMPOUNDS
ISOMER SHIFT
ISOTOPES
MOESSBAUER EFFECT
NEPTUNIUM 237
NEPTUNIUM COMPOUNDS
NEPTUNIUM ISOTOPES
NUCLEI
ODD-EVEN NUCLEI
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
PYRAZOLES
RADIOISOTOPES
STRUCTURAL CHEMICAL ANALYSIS
SYNTHESIS
TRANSURANIUM COMPOUNDS
YEARS LIVING RADIOISOTOPES