Difference between revisions of "Anhydro-iodic acid"
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| Section1 = {{Chembox Identifiers | | Section1 = {{Chembox Identifiers | ||
| InChI=1/I2O5.HIO3/c3-1(4)7-2(5)6;2-1(3)4/h;(H,2,3,4) | | InChI=1/I2O5.HIO3/c3-1(4)7-2(5)6;2-1(3)4/h;(H,2,3,4) | ||
| + | }} | ||
| + | | Section2 = {{Chembox Properties | ||
| + | | Reference = <ref name="G&E">{{Greenwood&Earnshaw1st|pages=997–99, 1010}}.</ref><ref name="Xray">{{citation | first1 = Y. D. | last1 = Feikema | first2 = Aafje | last2 = Vos | title = The crystal structures of two oxy-acids of iodine. II. An X-ray diffraction study of anhydro-iodic acid, HI<sub>3</sub>O<sub>8</sub> | journal = Acta Crystallogr. | year = 1966 | volume = 20 | issue = 6 | pages = 769–77 | doi = 10.1107/S0365110X6600183X}}.</ref> | ||
| + | | Formula = HI<sub>3</sub>O<sub>8</sub> | ||
| + | | MolarMass = 637.71 g mol<sup>−1</sup> | ||
| + | | Appearance = white solid | ||
| + | | Density = 4.97 g cm<sup>−3</sup> | ||
| + | | MeltingPt = 200 °C ''decomp'' | ||
| + | | Solubility = reacts | ||
| + | | SolubleOther = | ||
| + | | Solvent = | ||
| + | }} | ||
| + | | Section3 = {{Chembox Structure | ||
| + | | Reference = <ref name="Xray"/> | ||
| + | | SpaceGroup = P2<sub>1</sub>/''n'' (No. 11) | ||
| + | | Coordination = | ||
| + | | LattConst_a = 754.8(10) pm | ||
| + | | LattConst_b = 768.0(10) pm | ||
| + | | LattConst_c = 1140.2(15) pm | ||
| + | | LattConst_beta = 90.1(1) | ||
| + | }} | ||
| + | | Section7 = {{Chembox Hazards | ||
| + | | Reference = {{#tag:ref|Hazards were assessed as for an equimolar mixture of [[iodic acid]]<ref>{{GHS class NZ|id=12620|accessdate=2010-09-09}}. (iodic acid)</ref> and [[iodine pentoxide]].<ref>{{GHS class NZ|id=15707|accessdate=2010-09-10}}. (iodine pentoxide)</ref>|group=Note}} | ||
| + | | ExternalMSDS = | ||
| + | | EUIndex = not listed | ||
| + | | GHSPictograms = {{GHS03|Ox. Sol. 2}}{{GHS05|Skin Corr. 1B, Eye Dam. 1}} | ||
| + | | GHSSignalWord = DANGER | ||
| + | | HPhrases = {{H-phrases|272|314|318}} | ||
| + | | PPhrases = {{P-phrases|210|220|221|260|264|280| 301+330+331|303+361+353|363|304+340|310|321|305+351+338|370+378|405|501}} | ||
| + | | FlashPt = non-flammable | ||
| + | }} | ||
| + | | Section8 = {{Chembox Related | ||
| + | | OtherCpds = [[Iodine pentoxide]]<br/>[[Iodic acid]] | ||
}} | }} | ||
}} | }} | ||
| − | '''Anhydro-iodic acid''', HI<sub>3</sub>O<sub>8</sub>, is an [[ | + | '''Anhydro-iodic acid''', HI<sub>3</sub>O<sub>8</sub>, is an [[adduct]] of [[iodic acid]] and [[iodine pentoxide]], i.e. HIO<sub>3</sub>·I<sub>2</sub>O<sub>5</sub>. It is formed by the partial dehydration of iodic acid at about 100 °C, or by absorption of water by iodine pentoxide.<ref name="G&E"/>{{#tag:ref|Commercial "I<sub>2</sub>O<sub>5</sub>" is said to be essentially anhydro-iodic acid.<ref name="G&E"/>|group=Note}} It can be dehydrated to I<sub>2</sub>O<sub>5</sub> by heating in dry air to about 200 °C.<ref name="G&E"/> |
==Notes and references== | ==Notes and references== | ||
| Line 15: | Line 48: | ||
===Further reading=== | ===Further reading=== | ||
| − | *{{citation | + | *{{citation | title = A Combined Neutron Powder and X-Ray Single Crystal Diffraction Study of Anhydro-Iodic Acid, DIO<sub>3</sub>·I<sub>2</sub>O<sub>5</sub>, at 293 K | last1 = Ståhl | first1 = Kenny | last2 = Svensson | first2 = Christer | last3 = Szafranski | first3 = Marek | journal = J. Solid State Chem. | year = 1993 | volume = 102 | issue = 2 | pages = 408–13 | doi = 10.1006/jssc.1993.1052}}. |
| − | |||
| − | |||
| − | |||
[[Category:Iodine oxoacids]] | [[Category:Iodine oxoacids]] | ||
[[Category:Acids]] | [[Category:Acids]] | ||
| + | [[Category:Adducts]] | ||
{{CC-BY-3.0}} | {{CC-BY-3.0}} | ||
Latest revision as of 18:16, 10 September 2010
| Anhydro-iodic acid | |
|---|---|
| IUPAC name | iodic acid — diiodine pentaoxide (1/1) |
| Identifiers | |
| InChI | InChI=1/I2O5.HIO3/c3-1(4)7-2(5)6;2-1(3)4/h;(H,2,3,4) |
| Properties[1][2] | |
| Chemical formula | HI3O8 |
| Molar mass | 637.71 g mol−1 |
| Appearance | white solid |
| Density | 4.97 g cm−3 |
| Melting point |
200 °C decomp |
| Solubility in water | reacts |
| Structure[2] | |
| Space group | P21/n (No. 11) |
| Lattice constant | a = 754.8(10) pm, b = 768.0(10) pm, c = 1140.2(15) pm, α = 90°, β = 90.1(1)°, γ = 90° |
| Hazards[Note 1] | |
| EU index number | not listed |
| GHS pictograms |  
|
| GHS signal word | DANGER |
| GHS hazard statements | H272, H314, H318 |
| GHS precautionary statements | P210, P220, P221, P260, P264, P280, P301+330+331, P303+361+353, P363, P304+340, P310, P321, P305+351+338, P370+378 |
| Flash point | non-flammable |
| Related compounds | |
| Other compounds | Iodine pentoxide Iodic acid |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) | |
Anhydro-iodic acid, HI3O8, is an adduct of iodic acid and iodine pentoxide, i.e. HIO3·I2O5. It is formed by the partial dehydration of iodic acid at about 100 °C, or by absorption of water by iodine pentoxide.[1][Note 2] It can be dehydrated to I2O5 by heating in dry air to about 200 °C.[1]
Notes and references
Notes
- ↑ Hazards were assessed as for an equimolar mixture of iodic acid[3] and iodine pentoxide.[4]
- ↑ Commercial "I2O5" is said to be essentially anhydro-iodic acid.[1]
References
- ↑ 1.0 1.1 1.2 1.3 Greenwood, Norman N.; Earnshaw, A. Chemistry of the Elements; Pergamon: Oxford, 1984; pp 997–99, 1010. ISBN 0-08-022057-6.
- ↑ 2.0 2.1 Feikema, Y. D.; Vos, Aafje The crystal structures of two oxy-acids of iodine. II. An X-ray diffraction study of anhydro-iodic acid, HI3O8. Acta Crystallogr. 1966, 20 (6), 769–77. DOI: 10.1107/S0365110X6600183X.
- ↑ HSNO Chemical Classification Information Database, <http://www.ermanz.govt.nz/Chemicals/ChemicalDisplay.aspx?SubstanceID=12620> (accessed 9 September 2010), New Zealand Environmental Risk Management Authority. (iodic acid)
- ↑ HSNO Chemical Classification Information Database, <http://www.ermanz.govt.nz/Chemicals/ChemicalDisplay.aspx?SubstanceID=15707> (accessed 10 September 2010), New Zealand Environmental Risk Management Authority. (iodine pentoxide)
Further reading
- Ståhl, Kenny; Svensson, Christer; Szafranski, Marek A Combined Neutron Powder and X-Ray Single Crystal Diffraction Study of Anhydro-Iodic Acid, DIO3·I2O5, at 293 K. J. Solid State Chem. 1993, 102 (2), 408–13. DOI: 10.1006/jssc.1993.1052.
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