Iodine monofluoride
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| Names | |||
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| IUPAC name
Iodine monofluoride
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| Other names
Iodine fluoride
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| Identifiers | |||
3D model (
JSmol ) |
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PubChem CID
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CompTox Dashboard (EPA)
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| Properties | |||
| IF | |||
| Molar mass | 145.903 g/mol | ||
| Appearance | unstable brown solid | ||
| Melting point | −45 °C (−49 °F; 228 K) | ||
| Related compounds | |||
Other anions
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Astatine monoiodide
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Other cations
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Chlorine monofluoride Bromine monofluoride | ||
Related compounds
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Iodine trifluoride Iodine pentafluoride Iodine heptafluoride | ||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Iodine monofluoride is an
interhalogen compound of iodine and fluorine with formula IF. It is a chocolate-brown solid that decomposes at 0 °C,[1] disproportionating to elemental iodine and iodine pentafluoride
:
- 5 IF → 2 I2 + IF5
However, its molecular properties can still be precisely determined by
standard enthalpy change of formation is ΔfH° = −95.4 kJ mol−1, and its Gibbs free energy
is ΔfG° = −117.6 kJ mol−1.
It can be generated, albeit only fleetingly, by the reaction of the elements at −45 °C in CCl3F:
- I2 + F2 → 2 IF
It can also be generated by the reaction of iodine with iodine trifluoride at −78 °C in CCl3F:
- I2 + IF3 → 3 IF
The reaction of iodine with silver(I) fluoride at 0 °C also yields iodine monofluoride:
- I2 + AgF → IF + AgI
Reactions
Iodine monofluoride is used to produce pure nitrogen triiodide:[2]
- BN + 3 IF → NI3 + BF3
See also
References
- ISBN 978-3-11-011451-5.
- .