1,2-Dibromoethane → Sodium 1,2-Ethanedisulfonate

HRID 1930

Reaktionsgleichung

Reaktionsgleichung von HRID 1930
Br[CH2:2][CH2:3]Br.[S:5]([O-:8])([O-:7])=[O:6].[Na+:9].[Na+]>O>[CH2:2]([S:5]([O-:8])(=[O:7])=[O:6])[CH2:3][S:5]([O-:8])(=[O:7])=[O:6].[Na+:9].[Na+:9]

Komponenten

4

Edukt 2

HCID 78391,2-DibromoethaneHCID 24437Sodium Sulfite

Produkt 1

HCID 79220Sodium 1,2-EthanedisulfonateAusbeute 65,1 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 962WaterLösungsmittel

Versuchsvorschrift

A mixture of 1,2-dibromoethane (37.6 g, 0.20 mol) and sodium sulfite (63.0 g, 0.5 mol) in water (225 mL) was heated at reflux temperature for 20 h. After the mixture was cooled in the refrigerator, crystals were collected. The crude product was repeatedly recrystallized from water-ethanol. The trace amount of inorganic salts was removed by treating the aqueous solution with a small amount of silver(I) oxide and barium hydroxide. The basic solution was neutralized with Amberlite-120 ion-exchange resin and treated three times with Amberlite-120 (sodium form) ion-exchange resin. After removal of the water, the product was recrystallized from water-ethanol to afford the title compound (30.5 g).

Aufarbeitung

  1. temperaturewas heated
  2. temperatureat reflux temperature for 20 h
  3. temperatureAfter the mixture was cooled in the refrigerator, crystals
  4. customwere collected
  5. customThe crude product was repeatedly recrystallized from water-ethanol
  6. customThe trace amount of inorganic salts was removed
  7. additionby treating the aqueous solution with a small amount of silver(I) oxide and barium hydroxide
  8. additiontreated three times with Amberlite-120 (sodium form) ion-exchange resin
  9. customAfter removal of the water
  10. customthe product was recrystallized from water-ethanol

Quellen und Nachweise

ORD-Eintrag
ord-987cbce73ecd44fa89c19bbd9f39470c
Quelldatensatz
uspto-grants-1998_03
Patentnummer
US05728375

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