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| '''Hypoiodous acid''' is an ] with the ] {{chem2| |
'''Hypoiodous acid''' is an ] with the ] {{chem2|HIO|auto=1}}. It forms when an ] of ] is treated with ] or ] ]. It rapidly decomposes by ]:<ref name = "Wiberg&Holleman">{{cite book|last1=Holleman|first1=A.F.|title=Inorganic chemistry|date=2001|publisher=Academic Press, W. de Gruyter.|location=San Diego, Calif. : Berlin|isbn=0-12-352651-5|edition=1st English|editor-first=Nils|editor-last=Wiberg}}</ref> | ||
| :{{chem2|5 HIO → HIO3 + 2 I2 + 2 H2O}} | :{{chem2|5 HIO → HIO3 + 2 I2 + 2 H2O}} | ||
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| ]s can be formed by oxiation of the analogous ] salts. These and also ] are useful as ]s for a various types of ]s. | ]s can be formed by oxiation of the analogous ] salts. These and also ] are useful as ]s for a various types of ]s. | ||
| Hypoiodite is one of the active oxidizing agents generated by ] as part of the |
Hypoiodite is one of the active oxidizing agents generated by ] as part of the mammalian ].<ref>{{cite journal |doi= 10.1002/pro.4230 |title= Structural evidence of the oxidation of iodide ion into hyper-reactive hypoiodite ion by mammalian heme lactoperoxidase |date= 2022 |last1= Singh |first1= Prashant K. |last2= Ahmad |first2= Nayeem |last3= Yamini |first3= Shavait |last4= Singh |first4= Rashmi P. |last5= Singh |first5= Amit K. |last6= Sharma |first6= Pradeep |last7= Smith |first7= Michael L. |last8= Sharma |first8= Sujata |last9= Singh |first9= Tej P. |journal= Protein Science |volume= 31 |issue= 2 |pages= 384–395 |pmid= 34761444 |pmc= 8819834 }}</ref><ref>{{cite journal | doi = 10.1021/bi026326x | title = Reaction of Lactoperoxidase Compound I with Halides and Thiocyanate | date = 2002 | last1 = Furtmüller | first1 = Paul Georg | last2 = Jantschko | first2 = Walter | last3 = Regelsberger | first3 = Günther | last4 = Jakopitsch | first4 = Christa | last5 = Arnhold | first5 = Jürgen | last6 = Obinger | first6 = Christian | journal = Biochemistry | volume = 41 | issue = 39 | pages = 11895–11900 | pmid = 12269834 }}</ref> | ||
| ==Other oxyacids== | ==Other oxyacids== | ||
Latest revision as of 19:54, 1 January 2025
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| Names | |||
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| IUPAC name Hypoiodous acid | |||
| Identifiers | |||
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InChI
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SMILES
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| Properties | |||
| Chemical formula | HOI | ||
| Molar mass | 143.911 g·mol | ||
| Acidity (pKa) | 10.5 (in water, estimate) | ||
| Conjugate base | Hypoiodite | ||
| Related compounds | |||
| Related compounds | |||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa).
 N verify (what is ?)
Infobox references
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Hypoiodous acid is an inorganic compound with the chemical formula HIO. It forms when an aqueous solution of iodine is treated with mercuric or silver salts. It rapidly decomposes by disproportionation:
- 5 HIO → HIO3 + 2 I2 + 2 H2O
Hypoiodous acid is a weak acid with a pKa of about 11. The conjugate base is hypoiodite (IO). Salts of this anion can be prepared by treating I2 with alkali hydroxides. They rapidly disproportionate to form iodides and iodates.
Ammonium hypoiodites can be formed by oxiation of the analogous iodide salts. These and also sodium hypoiodite are useful as oxidizing agents for a various types of organic compounds.
Hypoiodite is one of the active oxidizing agents generated by lactoperoxidase as part of the mammalian innate immune system.
Other oxyacids
Hypoiodous acid is part of a series of oxyacids in which iodine can assume oxidation states of −1, +1, +3, +5, or +7. A number of neutral iodine oxides are also known.
| Iodine oxidation state | −1 | +1 | +3 | +5 | +7 |
|---|---|---|---|---|---|
| Name | Hydrogen iodide | Hypoiodous acid | Iodous acid | Iodic acid | Periodic acid |
| Formula | HI | HIO | HIO2 | HIO3 | HIO4 or H5IO6 |
References
- Perrin, D. D., ed. (1982) . Ionisation Constants of Inorganic Acids and Bases in Aqueous Solution. IUPAC Chemical Data (2nd ed.). Oxford: Pergamon (published 1984). Entry 119. ISBN 0-08-029214-3. LCCN 82-16524.
- ^ Holleman, A.F. (2001). Wiberg, Nils (ed.). Inorganic chemistry (1st English ed.). San Diego, Calif. : Berlin: Academic Press, W. de Gruyter. ISBN 0-12-352651-5.
- Singh, Prashant K.; Ahmad, Nayeem; Yamini, Shavait; Singh, Rashmi P.; Singh, Amit K.; Sharma, Pradeep; Smith, Michael L.; Sharma, Sujata; Singh, Tej P. (2022). "Structural evidence of the oxidation of iodide ion into hyper-reactive hypoiodite ion by mammalian heme lactoperoxidase". Protein Science. 31 (2): 384–395. doi:10.1002/pro.4230. PMC 8819834. PMID 34761444.
- Furtmüller, Paul Georg; Jantschko, Walter; Regelsberger, Günther; Jakopitsch, Christa; Arnhold, Jürgen; Obinger, Christian (2002). "Reaction of Lactoperoxidase Compound I with Halides and Thiocyanate". Biochemistry. 41 (39): 11895–11900. doi:10.1021/bi026326x. PMID 12269834.
| Iodine compounds | |
|---|---|
| Iodine(−I) | |
| Iodine(I) | |
| Iodine(II) | |
| Iodine(III) | |
| Iodine(IV) | |
| Iodine(V) | |
| Iodine(VII) | |
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