| 词条 | Sodium cobaltinitrite |
| 释义 |
| Verifiedfields = changed | verifiedrevid = 464400670 | Name = | ImageFile1 = Sodium cobaltinitrite.png | ImageFile2 = Sodium_cobaltinitrite_powder.jpg | IUPACName = sodium hexanitrocobaltate(III) | OtherNames = | SystematicName = | Section1 = {{Chembox Identifiers | ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}} | ChemSpiderID = 13198283 | InChI = 1/Co.6NO2.3Na/c;6*2-1-3;;;/q-3;;;;;;;3*+1/rCoN6O12.3Na/c8-2(9)1(3(10)11,4(12)13,5(14)15,6(16)17)7(18)19;;;/q-3;3*+1 | InChIKey = IMBXIBFCGMYSME-PEVTYUNUAJ | StdInChI_Ref = {{stdinchicite|correct|chemspider}} | StdInChI = 1S/Co.6NO2.3Na/c;6*2-1-3;;;/q-3;;;;;;;3*+1 | StdInChIKey_Ref = {{stdinchicite|correct|chemspider}} | StdInChIKey = IMBXIBFCGMYSME-UHFFFAOYSA-N | CASNo_Ref = {{cascite|changed|??}} | CASNo=13600-98-1 | PubChem= 16211641 | SMILES = [Na+].[Na+].[Na+].O=[N+]([O-])[Co-3]([N+]([O-])=O)([N+](=O)[O-])([N+]([O-])=O)([N+]([O-])=O)[N+]([O-])=O }} | Section2 = {{Chembox Properties | Co=1 | N=6 | Na=3 | O=12 | Appearance= | Density= 2.565 g/cm3 | MeltingPt= | BoilingPt= | Solubility= | Section3 = {{Chembox Hazards | ExternalSDS = JT Baker MSDS | FlashPt= | AutoignitionPt = | Section4 = | Section5 = | Section6 = }}Sodium cobaltinitrite is inorganic compound with the formula Na3Co(NO2)6. The anion of this yellow-coloured salt consists of the coordination complex [Co(NO2)6]3-. It was a reagent for the qualitative test for potassium and ammonium ions.[1] Synthesis and reactionsThe compound is prepared by oxidation of cobalt(II) salts in the presence of sodium nitrite:[2] 4 [Co(H2O)6](NO3)2 + O2 + 24 NaNO2 → 4 Na3[Co(NO2)6] + 8 NaNO3 + 4 NaOH + 22 H2O Application for analysis of potassiumAlthough the sodium cobaltinitrite is soluble in water, it forms the basis of a quantitative determination of potassium, thallium, and ammonium ions. Under the recommended reaction conditions the insoluble double salt, K2Na[Co(NO2)6]·H2O is precipitated and weighed.[3] In geochemical analysis, sodium cobaltinitrite is used to distinguish alkali feldspars from plagioclase feldspars in thin section.[4] {{Gallery|style= |File:Sodium cobaltinitrite solution.jpg |Concentrated aqueous solution of sodium cobaltinitrite. |File:Impure dipotassium sodium cobaltinitrite (K2Na(Co(NO2)6)) monohydrate.jpg |K2Na[Co(NO2)6]·H2O. }} See also
References1. ^{{Greenwood&Earnshaw2nd}} {{Inorganic-compound-stub}}2. ^{{cite encyclopedia|first=O. |last=Glemser |title=Sodium Hexanitritocobaltate(III) |encyclopedia=Handbook of Preparative Inorganic Chemistry |edition=2nd |editor-first=G. |editor-last=Brauer |publisher=Academic Press |date=1963 |location=New York, NY |volume=1 |page=1541}} 3. ^{{cite book|first=A. I. |last=Vogel|date=1951 |title=Quantitative Inorganic Analysis |edition=2nd|publisher=Longmans Green and Co.}} 4. ^{{cite journal|first1=E. H. |last1=Bailey |first2=R. E. |last2=Stevens|date=1960 |title=Selective staining of K-feldspar and plagioclase on rock slabs and thin sections|journal= American Mineralogist |volume=45 |pages=1020–1025}} 5. ^{{cite journal|journal=Acta Crystallographica Section C|title=Na3Co(NO2)6 at 293 and 10 K|authors=Brian N. Figgis, Alexandre N. Soboleva|volume =57| year=2001|pages=885-886|doi=10.1107/S0108270101007995}} 6 : Cobalt compounds|Sodium compounds|Chemical tests|Inorganic compounds|Coordination compounds|Nitrites |
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