Covalency of neptunium(IV) tris(cyclopentadienyl) compounds from Moessbauer spectra

Journal Article · Wed Aug 01 04:00:00 EDT 1979 · Inorg. Chem.; (United States)

DOI:https://doi.org/10.1021/ic50198a031· OSTI ID:5678220

Karraker, D G; Stone, J A

Isomer shifts measured from the /sup 237/Np Moessbauer spectra of NpCp/sub 3/OR (R = alkyl), NpCp/sub 3/R, and NpCpAr (Ar = aryl) are used as a measure of the covalency in Np(IV) ligand bonding. The isomer shifts in NpCp/sub 3/-n-Bu and NpCp/sub 3/C/sub 6/H/sub 4/C/sub 2/H/sub 5/ show a strong sigma character for the Np-n-Bu and Np-C/sub 6/H/sub 4/C/sub 2/H/sub 5/ bonds. The sigma character of Np-OR bonding is definite but less pronounced. The comparatively low covalency in the bonding of NpCp/sub 4/ is ascribed to longer Np-C bonds in NpCp/sub 4/ than in NpCp/sub 3//sup +/ compounds. The /sup 237/Np isomer shift in Np(MeCp)Cl/sub 3/ . 2THF indicates that the MeCp ligand is sigma-bonded in this compound.

• Research Organization: E.I. du Pont de Nemours and Co., Aiken, SC
• OSTI ID: 5678220
• Journal Information: Inorg. Chem.; (United States), Journal Name: Inorg. Chem.; (United States) Vol. 18:8; ISSN INOCA
• 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 COMPLEXES
ALKENES
AROMATICS
COMPARATIVE EVALUATIONS
COMPLEXES
COVALENCE
CYCLOALKENES
DATA
DATA FORMS
EXPERIMENTAL DATA
HYDROCARBONS
INFORMATION
ISOLATED VALUES
ISOMER SHIFT
LIGANDS
MOLECULAR STRUCTURE
NEPTUNIUM COMPLEXES
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANOMETALLIC COMPOUNDS
TRANSURANIUM COMPLEXES