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{{chembox |
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{{chembox |
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| Verifiedfields = changed |
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| verifiedrevid = 446123622 |
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| Watchedfields = changed |
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| Name = Iodine heptafluoride |
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| verifiedrevid = 446242167 |
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| ImageFile = Iodine-heptafluoride-2D-dimensions.png |
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⚫ |
| Name = Iodine heptafluoride |
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<!-- | ImageSize = 120px --> |
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| ImageName = Structure of the iodine heptafluoride molecule |
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| ImageFile = Iodine-heptafluoride-2D-dimensions.png |
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| ImageFileL1 = Iodine-heptafluoride-3D-balls.png |
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| ImageName = Structure of iodine heptafluoride(IF7) |
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<!-- | ImageSizeL1 = 120px --> |
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| ImageNameL1 = Iodine heptafluoride |
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| ImageFileL1 = Iodine-heptafluoride-3D-balls.png |
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| ImageFileR1 = Iodine-heptafluoride-3D-vdW.png |
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| ImageNameL1 = Iodine heptafluoride |
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| ImageFileR1 = Iodine-heptafluoride-3D-vdW.png |
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<!-- | ImageSizeR1 = 120px --> |
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| ImageNameR1 = Iodine heptafluoride |
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| ImageNameR1 = Iodine heptafluoride |
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| OtherNames = iodine fluoride<br />heptafluoroiodine |
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| OtherNames = Iodine(VII) fluoride<br />Heptafluoroiodine |
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| Section1 = {{Chembox Identifiers |
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|Section1={{Chembox Identifiers |
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| InChI = 1/F7I/c1-8(2,3,4,5,6)7 |
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| InChI = 1/F7I/c1-8(2,3,4,5,6)7 |
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| InChIKey = XRURPHMPXJDCOO-UHFFFAOYAO |
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| InChIKey = XRURPHMPXJDCOO-UHFFFAOYAO |
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| SMILES = FI(F)(F)(F)(F)(F)F |
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| SMILES = FI(F)(F)(F)(F)(F)F |
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| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}} |
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| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}} |
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| StdInChIKey = XRURPHMPXJDCOO-UHFFFAOYSA-N |
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| StdInChIKey = XRURPHMPXJDCOO-UHFFFAOYSA-N |
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| CASNo_Ref = {{cascite|correct|??}} |
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| CASNo = 16921-96-3 |
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| CASNo = 16921-96-3 |
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| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}} |
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| UNII_Ref = {{fdacite|correct|FDA}} |
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| UNII = M080M03ILM |
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| ChemSpiderID=21477354 |
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| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}} |
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| ChemSpiderID =21477354 |
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| PubChem = 85645 |
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}} |
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| Section2 = {{Chembox Properties |
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|Section2={{Chembox Properties |
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| Formula = IF<sub>7 |
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| Formula = IF<sub>7</sub> |
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| Appearance = colorless gas |
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| Appearance = colorless gas |
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| MolarMass = 259.90 g/mol |
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| MolarMass = 259.90 g/mol |
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| Density = 2.6 g/cm<sup>3</sup> (6 °C) <br> 2.7 g/cm<sup>3</sup> (25 °C) |
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| Density = 2.6 g/cm<sup>3</sup> (6 °C) <br> 2.7 g/cm<sup>3</sup> (25 °C) |
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| Solubility = soluble <ref>Pradyot Patnaik. ''Handbook of Inorganic Chemicals''. McGraw-Hill, 2002, ISBN 0070494398</ref> |
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| Solubility = soluble <ref>Pradyot Patnaik. ''Handbook of Inorganic Chemicals''. McGraw-Hill, 2002, {{ISBN|0-07-049439-8}}</ref> |
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| MeltingPt = 4.5°C (triple point) |
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| MeltingPtC = 4.5 |
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| MeltingPt_notes = (triple point) |
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| BoilingPt = 4.8°C (sublimes at 1 atm)}} |
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| BoilingPtC = 4.8 |
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| Section3 = {{Chembox Related |
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| BoilingPt_notes = (sublimes at 1 atm) |
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| OtherCpds = ]}} |
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}} |
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|Section3={{Chembox Related |
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| OtherCompounds = ] |
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'''Iodine heptafluoride''', also known as iodine(VII) fluoride or even iodine fluoride, is an ] with chemical formula ]]<sub>7</sub>.<ref>Macintyre, J. E. (Ed.). (1992). ''Dictionary of Inorganic Compounds'' (Vol. 3). London: Chapman & Hall.</ref><ref>O'Neil, Maryadele J. (Ed.). (2001). ''The Merck Index'' (13th ed.). Whitehouse Station, NJ: Merck.</ref> It has an unusual ] structure, as predicted by ].<ref>{{cite journal |
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'''Iodine heptafluoride''' is an ] with the chemical formula ]]<sub>7</sub>.<ref>Macintyre, J. E. (Ed.). (1992). ''Dictionary of Inorganic Compounds'' (Vol. 3). London: Chapman & Hall.</ref><ref>O'Neil, Maryadele J. (Ed.). (2001). ''The Merck Index'' (13th ed.). Whitehouse Station, NJ: Merck.</ref> It has an unusual ] structure, with ], as predicted by ].<ref>{{cite journal |
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| title = On the problem of heptacoordination: vibrational spectra, structure, and fluxionality of iodine heptafluoride |
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| title = On the problem of heptacoordination: vibrational spectra, structure, and fluxionality of iodine heptafluoride |
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| author = K. O. Christe, E. C. Curtis, D. A. Dixon |
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|author1=K. O. Christe |author2=E. C. Curtis |author3=D. A. Dixon | journal = ] |
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| journal = ] |
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| year = 1993 |
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| year = 1993 |
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| volume = 115 |
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| volume = 115 |
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| pages = 1520–1526 |
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| pages = 1520–1526 |
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| doi = 10.1021/ja00057a044 |
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| doi = 10.1021/ja00057a044 |
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}}</ref> The molecule can undergo a ]al rearrangement called the ], which is like the ] but for a hepta coordinated system.<ref>{{cite journal |
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}}</ref> The molecule can undergo a ]al rearrangement called the ], which is like the ] but for a heptacoordinated system.<ref>{{cite journal |
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| title = Structure, Pseudorotation, and Vibrational Mode Coupling in IF<sub>7</sub>: An Electron Diffraction Study |
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| title = Structure, Pseudorotation, and Vibrational Mode Coupling in IF<sub>7</sub>: An Electron Diffraction Study |
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| author = W. J. Adams, H. Bradford Thompson, L. S. Bartell |
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|author1=W. J. Adams |author2=H. Bradford Thompson |author3=L. S. Bartell | journal = ] |
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| journal = ] |
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| year = 1970 |
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| year = 1970 |
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| volume = 53 |
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| volume = 53 |
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| pages = 4040–4046 |
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| pages = 4040–4046 |
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| doi = 10.1063/1.1673876 |
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| doi = 10.1063/1.1673876 |
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|bibcode=1970JChPh..53.4040A | url = https://deepblue.lib.umich.edu/bitstream/2027.42/71219/2/JCPSA6-53-10-4040-1.pdf |
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| hdl = 2027.42/71219 |
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| hdl-access = free |
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}}</ref> |
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}}</ref> |
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It forms colourless crystals, which melt at 4.5 °C: the liquid range is extremely narrow, with the boiling point at 4.77 °C. The dense vapor has a mouldy, acrid odour. |
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Below 4.5 °C, IF<sub>7</sub> forms a snow-white powder of colorless crystals, melting at 5-6 °C. However, this melting is difficult to observe, as the liquid form is thermodynamically unstable at ]: instead, the compound begins to ] at 4.77 °C. The dense vapor has a mouldy, acrid odour.<ref>Lide, David R. (2011). '']'', 89th ed. p. <!-- NOT a range; do NOT replace with en dash -->].</ref><ref>{{harvnb|Ruff|Keim|1930|pp=180–182}}: "Das reine Jod-7-fluorid ist bei Zimmer­temperatur ein farbloses Gas, das an der Luft infolge seiner Umsetzung mit dem Wasser­dampf Nebel bildet und muffig sauer riecht. Beim Abkühlen wird es je nach den Versuchs­bedingungen als leicht bewegliche, farblose Flüssigkeit als schneeweißes lockeres Pulver oder in Form farbloser Kristalle erhalten....Die Schmelz­temperatur wurde durch Eintauchen von Proben, die in Quarzröhrchen eingeschmolzen waren, in Bäder passender Temperatur ermittelt und zu 5 bis 6° C gefunden. Messung der Dampfdrucke...gelangt man zu der Gleichung <math display=block>\log p=8,6604-\frac{1602,6}{T}</math>....Für den Druck von 760 mm errechnet sich eine Temperatur von 4,5° C. measurement of the vapor pressure...one arrives at the equation <math display=block>\log p=8.6604-\frac{1602.6}{T}</math>....At a pressure of 760 mm it computes a temperature of 4.5 °C.]"</ref> |
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==Preparation== |
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==Preparation== |
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IF<sub>7</sub> is prepared by passing ] through liquid ] at 90 °C, then heating the vapours to 270 °C. Alternately, this compound can be prepared from fluorine and dried ] or ] to minimize the formation of IOF<sub>5</sub>, an impurity arising by hydrolysis.<ref>{{cite journal |
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IF<sub>7</sub> is prepared by passing ] through liquid ] at 90 °C, then heating the vapours to 270 °C. Alternatively, this compound can be prepared from fluorine and dried ] or ] to minimize the formation of IOF<sub>5</sub>, an impurity arising by hydrolysis.<ref>{{cite journal| title = Iodine Heptafluoride |
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| first1 = W. C. | last1 = Schumb | first2 = M. A. | last2 = Lynch | journal = ] |
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| title = Iodine Heptafluoride |
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| author = W. C. Schumb, M. A. Lynch, Jr. |
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| journal = ] |
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| year = 1950 |
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| year = 1950 |
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| volume = 42 |
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| volume = 42 |
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| pages = 1383–1386 |
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| pages = 1383–1386 |
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| doi = 10.1021/ie50487a035 |
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| doi = 10.1021/ie50487a035 |
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}}</ref>{{sfn|Ruff|Keim|1930}} Iodine heptafluoride is also produced as a by-product when ] is used to prepare other platinum(V) compounds such as ], using ] in iodine pentafluoride solution:<ref>{{cite book | title = Halogen Chemistry | chapter = Pentahalides of the Transition Metals | pages = 179–226 | volume = 3 | first1 = A. D. | last1 = Beveridge | first2 = H. C. | last2 = Clark | editor-first = Viktor | editor-last = Gutmann | publisher = ] | year = 1967 | isbn = 9780323148474 | chapter-url = https://books.google.com/books?id=q0j8Imd8yQsC&pg=PA212}}</ref> |
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}}</ref><ref>{{cite journal |
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| title = "Das Jod-7-fluorid" (The iodine-7-fluoride) |
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:2 O<sub>2</sub>PtF<sub>6</sub> + 2 KF + IF<sub>5</sub> → 2 KPtF<sub>6</sub> + 2 O<sub>2</sub> + IF<sub>7</sub> |
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| author = Ruff O., Keim R. |
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| journal = Zeitschrift für Anorganische und Allgemeine Chemie |
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==Reactions== |
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| year = 1930 |
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Iodine heptafluoride decomposes at 200 °C to fluorine gas and ].<ref>{{cite book | last=Кнунянц | first=И. Л. | title=Химическая энциклопедия : в пяти томах | publisher=Советская Энциклопедия |date=1990 | isbn=5-85270-008-8 | oclc=19556260 | language=ru |page=496}}</ref> |
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| volume = 193 |
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| issue = 1/2 |
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| pages = 176–186 |
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| doi = 10.1002/zaac.19301930117 |
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}}</ref> |
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==Safety considerations== |
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==Safety considerations== |
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IF<sub>7</sub> is highly irritating to both the skin and the mucous membranes. It also is a strong oxidizer, and can cause fire on contact with organic material. |
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IF<sub>7</sub> is highly irritating to both the skin and the ]s. It also is a strong oxidizer and can cause fire on contact with organic material. |
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==References== |
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==References== |
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<references/> |
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{{reflist}} |
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===Common sources=== |
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* {{Cite journal |last=Ruff |first=Otto |last2=Keim |first2=Rudolf |date=1930-10-21 |title=Das Jod-7-fluorid |trans-title=Iodine Heptafluoride |journal=Zeitschrift für anorganische und allgemeine Chemie |language=de |volume=193 |issue=1/2 |pages=176–186 |doi=10.1002/zaac.19301930117 |issn=0863-1786}} |
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==External links== |
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