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Rhenium dioxide trifluoride

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Rhenium dioxide trifluoride
Identifiers
CAS Number
3D model (JSmol)
InChI
  • InChI=1S/3FH.2O.Re/h3*1H;;;/q;;;;;+3/p-3Key: MVRQLRVXKVDVMG-UHFFFAOYSA-K
SMILES
  • O=(F)(F)(F)=O
Properties
Chemical formula F3O2Re
Molar mass 275.200 g·mol
Appearance white
Density 5.161 g/cm
Melting point 35 °C; 95 °F; 308 K
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references
Chemical compound

Rhenium dioxide trfluoride is an inorganic compound with the formula ReO2F3. A white diamagnetic solid, it one of the few oxyfluorides of rhenium, another being rhenium trioxide fluoride, ReO3F. The material is of some academic interest as a rare example of an dioxide trifluoride. It can be prepared by the reaction of xenon difluoride and rhenium trioxide chloride:

2 ReO3Cl + 3 XeF2 → 2 ReO2F3 + O2 + Cl2 + 3 Xe

According to X-ray crystallography, the compound can exist in four polymorphs. Two polymorphs adopt chain-like structures featuring octahedral Re centers linked by ]s. Two other polymorphs adopt cyclic structures (ReO2F3)3 and (ReO2F3)4, again featuring octahedral Re centers and bridging fluorides. Like related oxyfluorides, these coordination oligomers break up in the presence of Lewis bases. Adducts of the formula ReO2F3L where L = acetonitrile have been crystallized.

References

  1. Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.
  2. Supeł, Joanna; Marx, Rupert; Seppelt, Konrad (2005). "Preparation and Structure of Rhenium Fluoride Trioxide ReO3F, and the Polymorphism of Rhenium Trifluoride Dioxide, ReO2F3". Zeitschrift für anorganische und allgemeine Chemie. 631 (15): 2979–2986. doi:10.1002/zaac.200500239.
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