MEASUREMENT OF NUCLEAR QUADRUPOLE INTERACTION IN IRON COMPLEXES USING THE MOSSBAUER EFFECT

Technical Report · Mon Jan 01 04:00:00 EST 1962

OSTI ID:4781216

Costa, N L; Danon, J; Xavier, R M

Nuclear quadrupole splitting and isomer shifts were measured for iron complexes at room temperature. The quadrupole coupling measurements were made by measuring the Mossbauer effect with iron in different electronic surroundings. The 14 different complexes in the bivalent and trivalent state of the spin-free and spin-paired type were investigated as absorbers. The complexes include potassium ferrocyanide, potassium ferricyanide, sodium nitroprusside, other substituted cyanides, ferrous oxalate, and halide substituted complexes. The data on the isomer shift indicate that the electron density at the nucleus is smallest in spin-free Fe/sup 2+/, and progressively increases in spin-free Fe/sup 3+/, spin-paired Fe/sup 2+/, and spin-paired Fe/sup 3+/. This shows that the electron of the ligands must be closer to the iron nucleus in the spin-paired case in order to increase the separation between d/sub epsilon / and the d/sub gamma orbitals. (N.W.R.)

• Research Organization: Rio de Janeiro. Centro Brasileiro de Pesquisas Fisicas
• NSA Number: NSA-17-000150
• OSTI ID: 4781216
• Report Number(s): NP-12085
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ATOMIC MODELS
CHEMISTRY
CYANIDES
HALIDES
IRON COMPLEXES
ISOMERS
MOESSBAUER EFFECT
NUCLEAR MAGNETIC RESONANCE
OXALATES
POTASSIUM COMPOUNDS
SPIN