16056-61-4

Basic information

• Product Name: IF₅O
• Synonyms: IF₅O
• CAS NO: 16056-61-4
• Molecular Weight: 237.896
• Mol File: 16056-61-4.mol

Chemical Properties

• CAS DataBase Reference: IF₅O(CAS DataBase Reference)
• NIST Chemistry Reference: IF₅O(16056-61-4)
• EPA Substance Registry System: IF₅O(16056-61-4)

Safety Data

• Hazardous Substances Data: 16056-61-4(Hazardous Substances Data)

Upstream product

• 16921-96-3 iodine heptafluoride 
• 177570-08-0 bromine pentafluoride 
• 25402-50-0 iodine trifluoride dioxide 
• 16871-76-4 tetrafluoroammonium hexafluoroantimonate 
• 77224-44-3 Cs⁽¹⁺⁾*IF₄O₂^(1-)=CsIF₄O₂ 
• 55188-51-7 Cs⁽¹⁺⁾*IF₄O₂^(1-)=CsIF₄O₂ 
• 7664-39-3 hydrogen fluoride 
• 7631-99-4 sodium nitrate 

Downstream Products

• 676353-70-1 iodine pentafluoride 
• 10544-72-6 dinitrogen tetraoxide 
• 118867-55-3 Li⁽¹⁺⁾*IF₄O^(1-)=LiIF₄O 
• 7789-24-4 lithium fluoride 
• 36374-06-8 Cs⁽¹⁺⁾*IF₄O^(1-)=CsIF₄O 
• 71891-46-8 Cs⁽¹⁺⁾*IF₄O₂^(1-)=CsIF₄O₂ 
• 13400-13-0 cesium fluoride 

Relevant articles and documents

Fluorine-oxygen exchange reactions in IF5, IF7, and IF5O

When reacted with alkali-metal nitrates, IF5 readily exchanges two fluorine ligands for a doubly bonded oxygen atom. In all cases MIF4O salts (M = Li, K, Cs) and FNO2 are formed as the primary products. The FNO2 byproduct undergoes a fast secondary reaction with MNO3 to yield equimolar amounts of N2O5 and MF. The N2O5 decomposes to N2O4 and 0.5 mol of O2, while the MF, depending on the nature of M, does or does not undergo complexation with the excess of IF5. Pure MIF4O salts, free of MF or MF·nIF5 byproducts, were prepared from MF, I2O5, and IF5 in either CH3CN or IF5 as a solvent. The new compounds LiIF4O, NaIF4O, RbIF4O, and NOIF4O were characterized by vibrational spectroscopy. It was also shown that, contrary to a previous report, FNO2 does not form a stable adduct with IF5 at temperatures as low as -78°C. An excess of IF7 reacts with MNO3 (M = Li, Na) to give MF, FNO2, IF5, and 0.5 mol of O2, but surprisingly no IF5O. With CsNO3, the reaction products are analogous, except for the CsF reacting with both the IF5 product and the excess of IF7 to give CsIF6·2IF5 and CsIF8, respectively. When in the IF7 reaction an excess of LiNO3, is used, the IF5 product undergoes further reaction with LiNO3, as described above. The IF5O molecule was found to be rather unreactive. It does not react with either LiF or CsF at 25 or 60°C or with LiNO3 or CsNO3 at 25°C. At 60°C with LiNO3, it slowly loses oxygen, with the IF5 product reacting to yield LiIF4O, as described above.

Syntheses and properties of FOIF4O, ClOIF4O, HOIF4O, and tetrafluoroperiodates

Mixtures of cis- and trans-CsIF4O2 were prepared by the interaction of CsIO4 with either anhydrous HF, BrF5, ClF3, ClF5, or F2. The vibrational spectra of these mixtures were recorded, and partial assignments are given for cis- and trans-IF4O2-. The assignments for trans-IF4O2- were supported by a normal-coordinate analysis. The CsIF4O2 salt dissolves in CH3CN with the formation of IF4O2- anions but undergoes solvolysis in anhydrous HF with formation of HOIF4O. An improved synthesis of HOIF4O from CsIF4O2 and BiF5 in anhydrous HF is reported, and its Raman and 19F NMR spectra were recorded. The interaction of CsIF4O2 with NF4SbF6 in anhydrous HF results in solutions containing NF4+, HF2-, and HOIF4O. When standing or when pumped to dryness, these mixtures decompose to yield NF3 and the new compound FOIF4O in high yield. The latter compound, the first known example of an iodine hypofluorite, was thoroughly characterized and shown by vibrational and NMR spectroscopy to be a mixture of the cis and trans isomers. For comparison, the vibrational spectra of IF5O have also been recorded. The reaction of CsIF4O2 with ClOSO2F was shown to yield the novel compound ClOIF4O. The fluorination reactions of CsIO4, CsIF4O2, IF5O, and HOIF4O with elementary fluorine were also studied.