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{{chembox {{Chembox
| Verifiedfields = changed
⚫ | ImageFile = ReO2structure.jpg
| Watchedfields = changed
| verifiedrevid = 437313373
⚫ | ImageFile = Rhenium dioxide.jpg
| ImageFile1 = Rutile-unit-cell-3D-balls.png
| ImageCaption1 = {{Color box|#BFC3C6|border=darkgray}} ] {{Color box|#ee2010|border=darkgray}} ]
| IUPACName = Rhenium(IV) oxide | IUPACName = Rhenium(IV) oxide
| OtherNames = Rhenium dioxide | OtherNames = Rhenium dioxide
| Section1 = {{Chembox Identifiers |Section1={{Chembox Identifiers
| Abbreviations = | Abbreviations =
| CASNo_Ref = {{cascite|correct|??}}
| CASNo = 12036-09-8 | CASNo = 12036-09-8
| EINECS = | EINECS = 234-839-0
| PubChem = 24861043 | PubChem = 82847
| SMILES = | InChI = 1S/2O.Re
| InChI =
| RTECS = | RTECS =
| MeSHName = | MeSHName =
| ChEBI = | ChEBI =
| KEGG_Ref = {{keggcite|correct|kegg}}
| KEGG = | KEGG =
| SMILES = O==O
| ATCCode_prefix =
⚫ }}
| ATCCode_suffix =
⚫ |Section2={{Chembox Properties
| ATC_Supplemental =}}
⚫ | Section2 = {{Chembox Properties
| Formula = ReO<sub>2</sub> | Formula = ReO<sub>2</sub>
| MolarMass = 218.206 g/mol | MolarMass = 218.206 g/mol
| Appearance = gray ] | Appearance = gray ]
| Density = 11.4 g/cm³<ref name="chem"> | Density = 11.4 g/cm<sup>3</sup><ref name="chem">
{{cite book | last = Lide {{cite book | last = Lide
| first = David R. | first = David R.
| year = 1998 | year = 1998
| title = Handbook of Chemistry and Physics | title = Handbook of Chemistry and Physics
| edition = 87 | edition = 87
| publisher = CRC Press | publisher = CRC Press
| isbn = 0-8493-0594-2 | pages = 484 | isbn = 0-8493-0594-2 | page = 484
| url = http://books.google.com/books?id=lFjg0L-uOxoC&pg=PT869&dq=%22Rhenium(IV)+oxide%22&as_brr=3&sig=fsZDL9bcqaIqe62fh0SCfRFxxb0#PPT869,M1 | url = https://books.google.com/books?id=lFjg0L-uOxoC&q=%22Rhenium(IV)+oxide%22&pg=PT869
| accessdate = 2008-06-05 | accessdate = 2008-06-05
}}</ref> }}</ref>
| MeltingPt = decomposes at 1000°C<ref name="comp"> | MeltingPt = decomposes at 1000&nbsp;°C<ref name="comp">
{{cite book {{cite book
| last = Perry | last1 = Perry
| first = Dale L. | first1 = Dale L.
| last2 = Phillips | last2 = Phillips
| first2 = Sidney L. | first2 = Sidney L.
| year = 1995 | year = 1995
| title = Handbook of Inorganic Compounds | title = Handbook of Inorganic Compounds
| publication-place = San Diego | location = San Diego
| publisher = CRC Press | publisher = CRC Press
| isbn = 0-8493-8671-3 | pages = 328 | isbn = 0-8493-8671-3 | page = 328
| url = http://books.google.com/books?id=0fT4wfhF1AsC&pg=PA328&dq=%22Rhenium(IV)+oxide%22&as_brr=3&sig=OfqQtu4StQ6Vv__h24BD2UrocQU | url = https://books.google.com/books?id=0fT4wfhF1AsC&q=%22Rhenium(IV)+oxide%22&pg=PA328
| accessdate = 2008-06-05 | accessdate = 2008-06-05
}}</ref> }}</ref>
| BoilingPt = | BoilingPt =
| Solubility = | Solubility = insoluble
| SolubleOther = | SolubleOther = insoluble
| Solvent = | Solvent = alkali
| pKa = | pKa =
| pKb = | pKb =
| MagSus = +44.0·10<sup>−6</sup> cm<sup>3</sup>/mol
⚫ }}
⚫ }}
| Section3 = {{Chembox Structure |Section3={{Chembox Structure
| CrystalStruct = Orthorohmbic, ] | CrystalStruct = Orthorohmbic, ]
| SpaceGroup = Pbcn, No. 60 | SpaceGroup = Pbcn, No. 60
⚫ }}
}}
| Section7 = {{Chembox Hazards |Section7={{Chembox Hazards
| ExternalMSDS = | ExternalSDS =
| EUClass =
| EUIndex =
| MainHazards = | MainHazards =
| NFPA-H = 1 | NFPA-H = 1
| NFPA-F = 0 | NFPA-F = 0
| NFPA-R = 0 | NFPA-R = 0
| NFPA-O = | NFPA-S =
| RPhrases = | HPhrases =
| SPhrases = | PPhrases =
| RSPhrases = | GHS_ref =
| FlashPt = | FlashPt =
| Autoignition = | AutoignitionPt =
| ExploLimits = | ExploLimits =
| PEL = }} | PEL =
}}
| Section8 = {{Chembox Related |Section8={{Chembox Related
| OtherAnions = ]<br />]<br />] | OtherAnions = ]<br />]<br />]
| OtherCations = ]<br />]<br /> | OtherCations = ]<br />]
}} }}
}} }}


'''Rhenium(IV) oxide''' or '''rhenium dioxide''' is the ] composed of ] and ] with the ] ReO<sub>2</sub>. This gray to black crystalline ] is a laboratory reagent that can be used as a ]. '''Rhenium(IV) oxide''' or '''rhenium dioxide''' is the ] with the ] ]O<sub>2</sub>. This gray to black crystalline ] is a laboratory reagent that can be used as a ]. It adopts the ] structure.

==Synthesis and reactions==
It forms via ]:<ref>G. Glemser "Rhenium (IV) Oxide" Handbook of Preparative Inorganic Chemistry, 2nd Ed. Edited by G. Brauer, Academic Press, 1963, NY. Vol. 1. p. 1480.</ref>
:2 Re<sub>2</sub>O<sub>7</sub> + 3 Re → 7 ReO<sub>2</sub>
Single crystals are obtained by ], using ] as the transporting agent.:<ref>{{cite book | last1 = Rogers | first1 = D. B. | last2 = Butler | first2 = S. R. | last3 = Shannon | first3 = R. D. | year = 1972 | title = Single Crystals of Transition-Metal Dioxides | series = Inorganic Syntheses | volume = XIII | pages = 135–145 | doi = 10.1002/9780470132449.ch27 | isbn = 9780470131725 }}</ref>
: ReO<sub>2</sub> + I<sub>2</sub> {{eqm}} ReO<sub>2</sub>I<sub>2</sub>

At high temperatures it undergoes ]:
:7{{nbsp}}ReO<sub>2</sub> → 2{{nbsp}}Re<sub>2</sub>O<sub>7</sub> + 3{{nbsp}}Re

It forms ]s with alkaline ] and ]s.<ref>{{cite web |url=http://www.aaamolybdenum.com/RheniumDioxide.html |title=RHENIUM DIOXIDE - Manufacturer |publisher=Aaamolybdenum.com |accessdate=2012-08-06 |url-status=dead |archiveurl=https://web.archive.org/web/20030209232809/http://www.aaamolybdenum.com/RheniumDioxide.html |archivedate=2003-02-09 }}</ref> In molten sodium hydroxide it forms sodium rhenate:<ref>G. Glemser "Sodium Rhenate (IV)" Handbook of Preparative Inorganic Chemistry, 2nd Ed. Edited by G. Brauer, Academic Press, 1963, NY. Vol. 1. p. 1483.</ref>

: 2{{nbsp}}NaOH + ReO<sub>2</sub> → Na<sub>2</sub>ReO<sub>3</sub> + H<sub>2</sub>O


==References== ==References==
{{reflist}} {{reflist}}

{{Rhenium compounds}}
{{Oxides}}


{{DEFAULTSORT:Rhenium(Iv) Oxide}} {{DEFAULTSORT:Rhenium(Iv) Oxide}}
] ]
] ]


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