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Syntheses, Raman spectroscopy and crystal structures of alkali hexa-fluorido-rhenates(IV) revisited.


ABSTRACT: The A2[ReF6] (A = K, Rb and Cs) salts are isotypic and crystallize in the trigonal space group type P [Formula: see text] m1, adopting the K2[GeF6] structure type. Common to all A2[ReF6] structures are slightly distorted octa-hedral [ReF6]2- anions with an average Re-F bond length of 1.951?(8)?Å. In those salts, symmetry lowering on the local [ReF6]2- anions from Oh (free anion) to D3d (solid-state structure) occur. The distortions of the [ReF6]2- anions, as observed in their Raman spectra, are correlated to the size of the counter-cations.

SUBMITTER: Louis-Jean J 

PROVIDER: S-EPMC5947479 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature

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Syntheses, Raman spectroscopy and crystal structures of alkali hexa-fluorido-rhenates(IV) revisited.

Louis-Jean James J   Mariappan Balasekaran Samundeeswari S   Smith Dean D   Salamat Ashkan A   Pham Chien Thang CT   Poineau Frederic F  

Acta crystallographica. Section E, Crystallographic communications 20180406 Pt 5


The <i>A</i><sub>2</sub>[ReF<sub>6</sub>] (<i>A</i> = K, Rb and Cs) salts are isotypic and crystallize in the trigonal space group type <i>P</i> [Formula: see text] <i>m</i>1, adopting the K<sub>2</sub>[GeF<sub>6</sub>] structure type. Common to all <i>A</i><sub>2</sub>[ReF<sub>6</sub>] structures are slightly distorted octa-hedral [ReF<sub>6</sub>]<sup>2-</sup> anions with an average Re-F bond length of 1.951 (8) Å. In those salts, symmetry lowering on the local [ReF<sub>6</sub>]<sup>2-</sup> a  ...[more]

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