Potassium Permanganate → 3-Methylbenzene-1,2-dicarboxylic acid

HRID 1751907Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1751907
[Na+].[Na+].[CH3:3][C:4]1[CH:12]=[CH:11][CH:10]=[C:6]([C:7]([O-:9])=[O:8])[C:5]=1[C:13]([O-:15])=[O:14].[Mn]([O-])(=O)(=O)=O.[K+]>O>[CH3:3][C:4]1[CH:12]=[CH:11][CH:10]=[C:6]([C:7]([OH:9])=[O:8])[C:5]=1[C:13]([OH:15])=[O:14]

Komponenten

4

Edukt 2

HCID 516875Potassium PermanganateHCID 20818087HCID 20818087, Verbindung

Produkt 1

HCID 353573-Methylbenzene-1,2-dicarboxylic acid

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 962WaterLösungsmittel

Versuchsvorschrift

3-Methylphthalic acid disodium salt (4.4 mmol) was dissolved in water (50 ml). Potassium permanganate (14.7 mmol) was added and the resulting solution was stirred for 18 h at room temperature. A precipitate was formed. The precipitate was filtered off and washed three times with hot water. The combined aqueous phase was evaporated under reduced pressure to approximately one third of the initial volume and cooled in an ice-bath. Concentrated HCl was added carefully for neutralization. Expected precipitation of hemimellitic acid did not occur. After evaporation of water in vacuo, the dark residue represented a complex mixture of compounds.

Aufarbeitung

  1. customA precipitate was formed
  2. filtrationThe precipitate was filtered off
  3. washwashed three times with hot water
  4. customThe combined aqueous phase was evaporated under reduced pressure to approximately one third of the initial volume
  5. temperaturecooled in an ice-bath
  6. additionConcentrated HCl was added carefully for neutralization
  7. customExpected precipitation of hemimellitic acid
  8. customAfter evaporation of water in vacuo
  9. additiona complex mixture of compounds

Quellen und Nachweise

ORD-Eintrag
ord-9daf975bb25e468298bcdf45df0d7bb3
Quelldatensatz
uspto-grants-2015_10
Patentnummer
US09162960B2

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