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X-ray diffraction and gamma-spectroscopic investigation of the trinuclear mixed-valent iron complex Fe/sub 3/(. mu. /sub 3/-O)-(CF/sub 3/COO)/sub 6/((C/sub 6/H/sub 5/)/sub 3/PO)/sub 3/

Journal Article · · Sov. J. Coordinat. Chem.; (United States)
OSTI ID:6322175
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The crystal and molecular structures of the trinuclear molecular cluster Fe/sub 3/(..mu../sub 3/-O)(CF/sub 3/COO)/sub 6/)(C/sub 6/H/sub 5/)/sub 3/PO)/sub 3/ have been determined: ..cap alpha.. = 22.045(10), b = 26.390(11), c = 14.265(9) A, ..gamma.. = 61.90(2)/sup 0/, Z = 4, space group P2/sub 1//b (diffractometer, lambdaCu K..cap alpha.., 2939 reflections, R = 0.074). The iron atoms are located at the corners of an almost equilateral triangle with sides measuring 3.325-3.374 A. The central bridging O(4) oxygen atom joins all three iron atoms, which are joined further in pairs by six bridging CF/sub 3/COO groups acting as bidentate ligands. The coordination of each iron atom is completed to octahedral by the triphenylphosphine oxide ligands. Gamma-resonance spectroscopy in the 80-300/sup 0/K temperature range has revealed a change in the character of the spectra at a temperature >210/sup 0/K, which is interpreted as the temperature for delocalization of an electron over a system of three centers corresponding to a gamma-resonance time scale of approx. 10/sup -7/ sec. At 300/sup 0/K the gamma-resonance spectra describe three different states for the iron atoms, in agreement with the x-ray data.
Research Organization:
Institute of Chemical Physics, Moldavia, USSR
OSTI ID:
6322175
Journal Information:
Sov. J. Coordinat. Chem.; (United States), Journal Name: Sov. J. Coordinat. Chem.; (United States) Vol. 12:3; ISSN SJCCD
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
360602 -- Other Materials-- Structure & Phase Studies
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
640302 -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
BINDING ENERGY
BOND ANGLE
BOND LENGTHS
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL BONDS
COHERENT SCATTERING
COMPLEXES
COORDINATION VALENCES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DIFFRACTION
DIMENSIONS
DISTANCE
ELECTRON DENSITY
ELECTRONS
ELEMENTARY PARTICLES
ENERGY
ENERGY LEVELS
FERMIONS
GAMMA SPECTRA
HIGH SPIN STATES
HYPERFINE STRUCTURE
INTERATOMIC DISTANCES
IRON COMPLEXES
LATTICE PARAMETERS
LENGTH
LEPTONS
LIGANDS
MOESSBAUER EFFECT
MOLECULAR STRUCTURE
MONOCLINIC LATTICES
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
SCATTERING
SPACE GROUPS
SPECTRA
STRUCTURAL CHEMICAL ANALYSIS
TPO
TRANSITION ELEMENT COMPLEXES
VALENCE
X-RAY DIFFRACTION