三氟氧化碘

三氟氧化碘是碘的一种氟氧化物，化学式 IOF₃。

制备

三氟氧化碘可以由碘、氟气和少量氧气的反应，五氟化碘的部分水解或是五氟化碘与五氧化二碘反应而成。^[5]

I₂ + O₂ + 3 F₂ → 2 IOF₃

IF₅ + H₂O → IOF₃ + 2HF

I₂O₅ + 3 IF₅ → 5 IOF₃

三氟氧化碘是白色晶体。^[1]虽然人们之前认为它的结构为离子化合物[IO₂]⁺[IF₆]^-^[5]，但之后的研究发现它其实以跷跷板形分子存在。^[3]

三氟氧化碘在110°C下分解成碘酰氟和五氟化碘，不过反应可逆。^[5]

2 IOF₃ ⇌ IO₂F + IF₅

它和五氟化溴反应，生成溴酰氟^[1]，而和氟离子受体IO₂F₃反应则会生成聚合物[IO₂F₄·IOF₂]_n。^[1]

^ ^1.0 ^1.1 ^1.2 ^1.3 ^1.4 Holloway, John H.; Laycock, David. Preparations and Reactions of Inorganic Main-Group Oxide Fluorides. Advances in Inorganic Chemistry. Elsevier. 1983. ISSN 0898-8838. doi:10.1016/s0898-8838(08)60107-5.
^ Pies, W.; Weiss, A. b1955, II.2.2.1 Simple oxide fluorides. Key Element: O. Part 2. Berlin/Heidelberg: Springer-Verlag. ISBN 3-540-09593-4. doi:10.1007/10201488_4.
^ ^3.0 ^3.1 Viers, Jimmy W.; Baird, H. Wallace. The crystal structure of iodine oxide trifluoride. Chemical Communications (London) (Royal Society of Chemistry (RSC)). 1967, (21): 1093. ISSN 0009-241X. doi:10.1039/c19670001093.
^ Finch, Arthur; Gates, Peter N.; Jenkinson, Michael A. Thermochemistry of fluorine compounds. Part III. Iodine oxide trifluoride and iodyl fluoride. Journal of the Chemical Society, Dalton Transactions (Royal Society of Chemistry (RSC)). 1973, (23): 2725. ISSN 0300-9246. doi:10.1039/dt9730002725.
^ ^5.0 ^5.1 ^5.2 Aynsley, E. E.; Nichols, R.; Robinson, P. L. 126. Reactions of iodine pentafluoride with inorganic substances. Iodine oxytrifluoride and iodyl fluoride. Journal of the Chemical Society (Resumed) (Royal Society of Chemistry (RSC)). 1953: 623. ISSN 0368-1769. doi:10.1039/jr9530000623.