Rhenium heptafluoride | Wikipedia audio article
Channel: wikipedia tts
Date: 2018-10-25

This is an audio version of the Wikipedia Article:
Rhenium heptafluoride

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SUMMARY
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Rhenium heptafluoride is the compound with the formula ReF7. It is a yellow low melting solid, and is the only thermally stable metal heptafluoride. It has a distorted pentagonal bipyramidal structure similar to IF7, which was confirmed by neutron diffraction at 1.5K. The structure is non-rigid as evidenced by electron diffraction studies.It can be prepared from the elements at 400 °C:
2Re + 7 F2 → 2 ReF7With fluoride donors such as CsF, the ReF8− anion is formed, which has a square antiprismatic structure. With antimony pentafluoride, SbF5, a fluoride acceptor, the ReF6+ cation  is formed.