Difference between revisions of "Hypochlorous acid"
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| StdInChIKey = QWPPOHNGKGFGJK-UHFFFAOYSA-N | | StdInChIKey = QWPPOHNGKGFGJK-UHFFFAOYSA-N | ||
| CASNo = 7790-92-3 | | CASNo = 7790-92-3 | ||
| + | | EINECS = 232-232-5 | ||
}} | }} | ||
| Section2 = {{Chembox Properties | | Section2 = {{Chembox Properties | ||
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| Reference = <ref name="v1">{{citation | first1 = R. M. | last1 = Escribano | first2 = G. | last2 = Di Lonardo | first3 = L. | last3 = Fusina | title = Empirical anharmonic force field and equilibrium structure of hypochlorous acid, HOCl | journal = Chem. Phys. Lett. | volume = 259 | issue = 5–6 | pages = 614–18 | year = 1996 | doi = 10.1016/0009-2614(96)00774-9}}.</ref> | | Reference = <ref name="v1">{{citation | first1 = R. M. | last1 = Escribano | first2 = G. | last2 = Di Lonardo | first3 = L. | last3 = Fusina | title = Empirical anharmonic force field and equilibrium structure of hypochlorous acid, HOCl | journal = Chem. Phys. Lett. | volume = 259 | issue = 5–6 | pages = 614–18 | year = 1996 | doi = 10.1016/0009-2614(96)00774-9}}.</ref> | ||
| MolShape = bent: ''r''(Cl–O) = 168.90 pm, ''θ''(Cl–O–H) = 102.97° | | MolShape = bent: ''r''(Cl–O) = 168.90 pm, ''θ''(Cl–O–H) = 102.97° | ||
| + | }} | ||
| + | | Section4 = {{Chembox Thermochemistry | ||
| + | | Reference = <ref name="NIST">{{NIST chemistry | name = Hypochlorous acid | id = 1S/ClHO/c1-2/h2H | accessdate = 2011-1-1}}.</ref> | ||
| + | | DeltaHf = −74.48 kJ mol<sup>−1</sup> (gas) | ||
| + | | Entropy = 236.50 J K<sup>−1</sup> mol<sup>−1</sup> (gas) | ||
}} | }} | ||
| Section8 = {{Chembox Related | | Section8 = {{Chembox Related | ||
| OtherFunctn = [[Hypofluorous acid]]<br/>[[Hypobromous acid]]<br/>[[Hypoiodous acid]] | | OtherFunctn = [[Hypofluorous acid]]<br/>[[Hypobromous acid]]<br/>[[Hypoiodous acid]] | ||
| Function = hypohalous acids | | Function = hypohalous acids | ||
| − | | OtherCpds = [[Chlorous acid]]<br/>[[Chloric acid]]<br/>[[Perchloric acid]] | + | | OtherCpds = [[Hydrochloric acid]]<br/>[[Chlorous acid]]<br/>[[Chloric acid]]<br/>[[Perchloric acid]] |
}} | }} | ||
}} | }} | ||
| − | '''Hypochlorous acid''', HOCl, is an [[oxoacid]] of [[chlorine]]. It is often considered to be only stable in aqueous solution,<ref name="C&W"/><ref name="G&E">{{Greenwood&Earnshaw1st|pages=999–1007}}.</ref> but it can be prepared in sufficient quantities in the gas phase for spectroscopic studies.<ref name="v1"/> | + | '''Hypochlorous acid''', HOCl, is an [[oxoacid]] of [[chlorine]]. It is often considered to be only stable in aqueous solution,<ref name="C&W"/><ref name="G&E">{{Greenwood&Earnshaw1st|pages=999–1007}}.</ref> but it can be prepared in sufficient quantities in the gas phase for spectroscopic and even thermodynamic studies.<ref name="v1"/><ref name="NIST"/> |
==Preparation== | ==Preparation== | ||
| Line 45: | Line 51: | ||
[[Category:Chlorine oxoacids]] | [[Category:Chlorine oxoacids]] | ||
| + | [[Category:Hypochlorites|*]] | ||
{{CC-BY-3.0}} | {{CC-BY-3.0}} | ||
Latest revision as of 14:23, 1 January 2011
| Hypochlorous acid | |
|---|---|
| IUPAC name | Hypochlorous acid[note 1] |
| Other names | Chloric(I) acid Chloranol Hydroxidochlorine |
| Identifiers | |
| InChI | InChI=1/ClHO/c1-2/h2H |
| InChIKey | QWPPOHNGKGFGJK-UHFFFAOYAT |
| Standard InChI | InChI=1S/ClHO/c1-2/h2H |
| Standard InChIKey | QWPPOHNGKGFGJK-UHFFFAOYSA-N |
| CAS number | [] |
| EC number | |
| ChemSpider | |
| Properties[2] | |
| Chemical formula | HOCl |
| Molar mass | 52.460 g mol−1 |
| Acidity (pKa) | 7.47 |
| Structure[3] | |
| Molecular geometry | bent: r(Cl–O) = 168.90 pm, θ(Cl–O–H) = 102.97° |
| Thermochemistry[4] | |
| Std enthalpy of formation ΔfH |
−74.48 kJ mol−1 (gas) |
| Standard molar entropy S |
236.50 J K−1 mol−1 (gas) |
| Related compounds | |
| Other hypohalous acids | Hypofluorous acid Hypobromous acid Hypoiodous acid |
| Other compounds | Hydrochloric acid Chlorous acid Chloric acid Perchloric acid |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) | |
Hypochlorous acid, HOCl, is an oxoacid of chlorine. It is often considered to be only stable in aqueous solution,[2][5] but it can be prepared in sufficient quantities in the gas phase for spectroscopic and even thermodynamic studies.[3][4]
Contents
Preparation
Structure
Reactivity
Notes and references
Notes
- ↑ Hypochlorous acid is a retained name in IUPAC nomenclature.[1]
References
- ↑ Nomenclature of Inorganic Chemistry; IUPAC Recommendations 2005; Royal Society of Chemistry: Cambridge, 2005; p 294. ISBN 0-85404-438-8, <http://www.iupac.org/publications/books/rbook/Red_Book_2005.pdf>.
- ↑ 2.0 2.1 Cotton, F. Albert; Wilkinson, Geoffrey Advanced Inorganic Chemistry, 5th ed.; Wiley-Interscience: New York, 1988; pp 563–67. ISBN 0-471-84997-9.
- ↑ 3.0 3.1 Escribano, R. M.; Di Lonardo, G.; Fusina, L. Empirical anharmonic force field and equilibrium structure of hypochlorous acid, HOCl. Chem. Phys. Lett. 1996, 259 (5–6), 614–18. DOI: 10.1016/0009-2614(96)00774-9.
- ↑ 4.0 4.1 Hypochlorous acid. In NIST Chemistry WebBook; National Institute for Standards and Technology, <http://webbook.nist.gov/cgi/inchi/InChI%3D1S/ClHO/c1-2/h2H>. (accessed 1 January 2011).
- ↑ Greenwood, Norman N.; Earnshaw, A. Chemistry of the Elements; Pergamon: Oxford, 1984; pp 999–1007. ISBN 0-08-022057-6.
External links
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See also the corresponding article on Wikipedia. |
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