Reaction #1076748

ord-41998616a7dd415388b9f444902f1e40

Reaction equation

[Cl-].[Cl-].[Cl-].[Cr+3]
chromium chloride
O=C1O[C@H]([C@@H](O)CO)C(O)=C1O
ascorbic acid
O=C1O[C@H]([C@@H](O)CO)C(O)=C1O
Asc
→
O=C1O[C@H]([C@@H](O)CO)C([O-])=C1O.O=C1O[C@H]([C@@H](O)CO)C([O-])=C1O.O=C1O[C@H]([C@@H](O)CO)C([O-])=C1O.[Cr+3]
Chromium Ascorbate

Reactants

—
Cr Asc
[Cl-].[Cl-].[Cl-].[Cr+3]
chromium chloride
O=C1O[C@H]([C@@H](O)CO)C(O)=C1O
ascorbic acid
O=C1O[C@H]([C@@H](O)CO)C(O)=C1O
Asc

Reagents

None

Solvents

O
water
O
water

Conditions

Temperature
50°CELSIUS
Detailed conditions
See reaction.notes.procedure_details.

Workup

  1. 1
    Otherto get a green solution
  2. 2
    workup.ADDITIONwas added to the solution
  3. 3
    Otherto get a dark green solution
  4. 4
    ConcentrationThe solution was concentrated in vacuum
  5. 5
    workup.ADDITIONthe large volume of ethanol 90% was added
  6. 6
    Otherto get a green sediment

Procedure

Half gram (1.85 mmole) of chromium chloride (CrCl3) was dissolved in 30 ml of deionized water to get a green solution. 1.0 g (5.5 mmole) of ascorbic acid (Asc) dissolved in 40 ml of deionized water, was added to the solution. The pH of the reaction mixture was adjusted to 4.5 (pK(Asc)4.2), and the reaction mixture was stirred for 3 hours at 50° C. to get a dark green solution. The solution was concentrated in vacuum and the large volume of ethanol 90% was added to get a green sediment. UV-VIS Spectrum for Cr-Asc showed two main absorbance peaks at 263 and 592 nm.

Source

DOI: 10.6084/m9.figshare.5104873.v1Patent: US06458351B2uspto-grants-2002_10