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Revision as of 13:52, 14 January 2011 editCheMoBot (talk | contribs)Bots141,565 edits Updating {{chembox}} (no changed fields - added verified revid - updated 'UNII_Ref', 'ChemSpiderID_Ref', 'StdInChI_Ref', 'StdInChIKey_Ref', 'ChEMBL_Ref', 'KEGG_Ref') per Chem/Drugbox validation (← Previous edit		Latest revision as of 22:40, 1 December 2024 edit undoGraeme Bartlett (talk | contribs)Administrators250,114 edits chemspider
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	{{chembox		{{chembox
			| Verifiedfields = changed
⚫	| verifiedrevid = 407430928
			| Watchedfields = changed
		⚫	| verifiedrevid = 407839996
	| ImageFile = Cobalt(III) oxide.JPG		| ImageFile = Cobalt(III) oxide.JPG
	| Name = Cobalt(III) oxide<ref></ref>		| Name = Cobalt(III) oxide<ref></ref>
	| IUPACName = cobalt(III) oxide, dicobalt trioxide		| IUPACName = cobalt(III) oxide, dicobalt trioxide
	| OtherNames = cobaltic oxide, cobalt sesquioxide		| OtherNames = cobaltic oxide, cobalt sesquioxide
	| Section1 = {{Chembox Identifiers		|Section1={{Chembox Identifiers
	| CASNo_Ref = {{cascite|correct|CAS}}		| CASNo_Ref = {{cascite|correct|CAS}}
	| CASNo = 1308-04-9		| CASNo = 1308-04-9
			| ChemSpiderID = 3324433
	| PubChem = 24847893
	| SMILES = }}		| PubChem = 4110762
			| InChI = 1S/2Co.3O
⚫	| Section2 = {{Chembox Properties
			| InChIKey = UPWOEMHINGJHOB-UHFFFAOYSA-N
			| SMILES = O=O=O
			| EINECS = 215-156-7
			| RTECS = GG2900000
			}}
		⚫	|Section2={{Chembox Properties
	| Formula = Co<sub>2</sub>O<sub>3</sub>		| Formula = Co<sub>2</sub>O<sub>3</sub>
	| MolarMass = 165.86 g/mol		| MolarMass = 165.8646 g/mol
	| Appearance = black powder		| Appearance = red powder
	| Density = 5.18 g/cm<sup>3</sup> <ref>{{RubberBible87th}}</ref>		| Density = 5.18 g/cm<sup>3</sup> <ref>{{RubberBible87th}}</ref>
			| MeltingPtC = 895<ref>{{Cite web | url=http://www.chemicalbook.com/ChemicalProductProperty_US_CB4291419.aspx | title=1308-04-9 CAS MSDS (COBALT(III) OXIDE BLACK) Melting Point Boiling Point Density CAS Chemical Properties }}</ref>
	| MeltingPt = 1900 °C
	| BoilingPt =		| BoilingPt =
	| Solubility =		| Solubility = negligible
			| MagSus = +4560.0·10<sup>−6</sup> cm<sup>3</sup>/mol
	}}		}}
	| Section3 = {{Chembox Structure		|Section3={{Chembox Structure
	| CrystalStruct = Trigonal, ]		| CrystalStruct = ], ]
	| SpaceGroup = R-3c, No. 167		| SpaceGroup = R{{overline|3}}c, No. 167
			}}
			|Section4={{Chembox Thermochemistry
			| DeltaHf = -577 kJ/mol
	}}		}}
	| Section7 = {{Chembox Hazards		|Section7={{Chembox Hazards
			| MainHazards = toxic
	| MainHazards<link rel="stylesheet" type="text/css" href="http://en.wikipedia.org/search/?title=User:Lupin/navpop.css&action=raw&ctype=text/css&dontcountme=s"> =
	| RPhrases = {{R22}} {{R40}} {{R43}}		| GHSPictograms = {{GHS07}}{{GHS08}}
			| GHSSignalWord = Warning
	| SPhrases = {{S36/37}}
			| HPhrases = {{H-phrases|302|317|351|410}}
	| Autoignition = }}
			| PPhrases = {{P-phrases|280}}
			| AutoignitionPt =
			| NFPA-H = 3
			| NFPA-F = 0
			| NFPA-R = 0
			| NFPA-S = OX}}
	}}		}}
	'''Cobalt(III) oxide''' is the ] with the formula Co<sub>2</sub>O<sub>3</sub>. Although only two oxides of cobalt are well characterized, CoO and Co<sub>3</sub>O<sub>4</sub>,<ref>{{Greenwood&Earnshaw2nd}}</ref> procedures claiming to give Co<sub>2</sub>O<sub>3</sub> have been described. Thus treatment of Co(II) salts such as ] with an aqueous solution of ] (also known as bleach) gives a black solid.<ref>Handbook of Preparative Inorganic Chemistry, 2nd Ed. Edited by G. Brauer, Academic Press, 1963, NY. p. 1675.</ref> Some formulations of the catalyst ] contain "Co<sub>2</sub>O<sub>3</sub>".		'''Cobalt(III) oxide''' is the ] with the formula of Co<sub>2</sub>O<sub>3</sub>. Although only two oxides of cobalt are well characterized, ] and ],<ref>{{Greenwood&Earnshaw2nd}}</ref> procedures claiming to give Co<sub>2</sub>O<sub>3</sub> have been described. Thus treatment of Co(II) salts such as ] with an aqueous solution of ] (also known as bleach) gives a black solid:<ref>Handbook of Preparative Inorganic Chemistry, 2nd Ed. Edited by G. Brauer, Academic Press, 1963, NY. p. 1675.</ref><ref>{{cite journal | last=Hüttner | first=Erwin | title=Beiträge zur Kenntnis der Oxyde des Kobalts | journal=Zeitschrift für anorganische Chemie | publisher=Wiley | volume=27 | issue=1 | date=1901-05-02 | issn=0863-1778 | doi=10.1002/zaac.19010270113 | pages=81–124| url=https://zenodo.org/record/2455069 |language=de}}</ref>
			:2CoSO<sub>4</sub> + 4NaOH + NaOCl → Co<sub>2</sub>O<sub>3</sub> + 2Na<sub>2</sub>SO<sub>4</sub> + NaCl
			Some formulations of the catalyst ] contain "Co<sub>2</sub>O<sub>3</sub>".
			Some studies have been unable to synthesize the compound, and report that it is theoretically unstable.<ref>{{cite journal | last1=Shanbhag | first1=Pavitra N. | last2=Biswas | first2=Raju K. | last3=Pati | first3=Swapan K. | last4=Sundaresan | first4=Athinarayanan | last5=Rao | first5=Chinthamani Nagesa Ramachandra | title=Elusive Co2O3: A Combined Experimental and Theoretical Study | journal=ACS Omega | publisher=American Chemical Society (ACS) | volume=5 | issue=45 | date=2020-11-02 | issn=2470-1343 | doi=10.1021/acsomega.0c03397 | pages=29009–29016| pmid=33225132 | pmc=7675568 }}</ref>
			It is soluble in cold diluted ] and produces Co<sub>2</sub><sub>3</sub>, which is blue in aqueous solution.
			: Co<sub>2</sub>O<sub>3</sub> + 3H<sub>2</sub>SO<sub>4</sub> → Co<sub>2</sub><sub>3</sub> + 3H<sub>2</sub>O
			Cobalt(III) ion is a strong ] in acidic solution, its ] is +1.84V in this situation.<ref>{{cite book |last1=Guoqing |first1=Wu |title=无机化学 (Inorganic Chemistry) |date=2003 |publisher=高等教育出版社 (Higher Education Press) |location=People's Republic of China |isbn=9787040115833 |page=781 |edition=4th }}</ref>
			==See also==
			*]
	==References==		==References==
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	{{Cobalt compounds}}		{{Cobalt compounds}}
			{{oxygen compounds}}
	]		]
	]
	]		]
			]
	]
	]
	]
	]
	]