2,3-Dihydroxybutanedioic Acid → Gluconic Acid

HRID 1154991Notes

Reaction equation

HRID 1154991 reaction equation
[C:1]([OH:10])(=O)[CH:2]([CH:4]([C:6]([OH:8])=[O:7])[OH:5])[OH:3].[Zn:11].[Co:12]>[Ni]>[Zn:11].[Co:12].[O:7]=[C:6]([OH:8])[C@@H:4]([C@H:2]([C@@H:1]([C@@H:2]([CH2:1][OH:10])[OH:3])[OH:10])[OH:3])[OH:5]

Participants

5

Reactant 2

HCID 8752,3-Dihydroxybutanedioic AcidHCID 56941092Cobalt--zinc (1/1)

Product 2

HCID 10690Gluconic AcidHCID 56941092Cobalt--zinc (1/1)

Reagents, catalysts & solvents 1

HCID 935NickelCatalyst

Procedure

An aqueous cobalt-zinc electrolyte is prepared as in Example 7 but containing 50 g/l tartaric acid instead of sodium glucoheptonate. A nickel plated S-shaped steel panel is plated for 10 minutes at 15 ASF in accordance with the conditions of Example 2. The resultant cobalt-zinc electrodeposit is observed as being more gray in color than that obtained in accordance with Example 6 employing gluconic acid alone. The addition of 10 g/l of citric acid in combination with the 50 g/l tartaric acid followed by pH adjustment resulted in the deposition on a similar S-shaped steel panel of a cobalt-zinc electrodeposit which was of uniform brightness over the entire surface and had an excellent chromium-like appearance equivalent to that obtained in Example 2.

Sources & evidence

ORD record
ord-45464cf9ba1041fc9fc7d9b601e0bd3c
Source dataset
uspto-grants-1981_11
Patent number
US04299671

Reaction notes

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