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iodine monofluoride : ウィキペディア英語版
iodine monofluoride

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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,〔
Mary Eagleson (1994), ''Concise Encyclopedia of Chemistry''. Walter de Gruyter. 1201 pages. ISBN 3-11-011451-8, ISBN 978-3-11-011451-5.
disproportionating to elemental iodine and iodine pentafluoride:
:5 IF → 2 I2 + IF5
However, its molecular properties can still be precisely determined by spectroscopy: the iodine-fluorine distance is 190.9 pm and the I−F bond dissociation energy is around 277 kJ mol−1. At 298 K, its standard enthalpy change of formation is Δ''H''f° = −95.4 kJ mol−1, and its Gibbs free energy is Δ''G''f° = −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:
:BN + 3 IF → NI3 + BF3

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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