Bismuth pentafluoride
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Other names
bismuth(V) fluoride
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Identifiers | |
3D model (
JSmol ) |
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ChEBI | |
ChemSpider | |
ECHA InfoCard
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100.029.205 |
PubChem CID
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UNII | |
CompTox Dashboard (EPA)
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Properties | |
BiF5 | |
Molar mass | 303.97 g mol−1 |
Appearance | long white needles,[1] colourless crystalline solid[2] |
Density | 5.40 g cm−3[1] |
Melting point | 151.4 °C (304.5 °F; 424.5 K) ,[2] 154.4 °C[1] |
Boiling point | 230 °C (446 °F; 503 K)[1][2] |
Structure | |
octahedral Bi | |
Hazards | |
GHS labelling: | |
Danger | |
H272, H314 | |
P210, P220, P221, P260, P264, P280, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P310, P321, P363, P370+P378, P405, P501 | |
NFPA 704 (fire diamond) | |
Flash point | non-combustible |
Safety data sheet (SDS) | MSDS |
Related compounds | |
Other anions
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bismuth triiodide, pentamethylbismuth
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Other cations
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phosphorus pentafluoride, arsenic pentafluoride, antimony pentafluoride |
Related compounds
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bismuth trifluoride |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Bismuth pentafluoride is an inorganic compound with the formula BiF5. It is a white solid that is highly reactive. The compound is of interest to researchers but not of particular value.
Structure
BiF5 is polymeric and consists of linear chains of trans-bridged corner sharing BiF6 octahedra.[1][3] This is the same structure as α-UF5.[1]
(BiF5)∞ chain | packing of chains |
Preparation
BiF5 can be prepared by treating BiF3 with F2 at 500 °C.[2]
- BiF3 + F2 → BiF5
In an alternative synthesis, ClF3 is the fluorinating agent at 350 °C.[4]
- BiF3 + ClF3 → BiF5 + ClF
Reactions
Bismuth pentafluoride is the most reactive of the pnictogen pentafluorides and is an extremely strong
BiF5 also reacts with alkali metal fluorides, MF, to form hexafluorobismuthates, M[BiF6], containing the hexafluorobismuthate anion, [BiF6]−.[2] Bismuth pentafluorude in hydrofluoric acid solvent also reacts with nickel fluoride to form the nickel salt of this anion, which can be incorporated into a complex with acetonitrile.[5]
References
- ^ ISBN 978-0-08-037941-8.
- ^ ISBN 0-12-352651-5
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