Molecular motion in solids: Mössbauer spectra of [Fe(η-C6H6)(η-C5H5)][AsF6]
- 1 January 1992
- journal article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 1,p. 73-76
- https://doi.org/10.1039/dt9920000073
Abstract
The 57Fe Mössbauer spectrum of the compound [Fe(η-C6H6)(η-C5H5)][AsF6] has been recorded in the temperature range 77–315 K. At low temperatures the spectrum is the expected quadrupole doublet but as the temperature is raised a new doublet gradually develops in the centre of the absorption. This feature is fully developed at 312 K. A relaxation model based on anisotropic reorientation of the sandwich cations within a monoclinic lattice is put forward.Keywords
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