Ethylenediaminetetraacetic Acid → Ferrous picrate

HRID 2286294Notes

Reaction equation

HRID 2286294 reaction equation
C(N(CC(O)=O)CC(O)=O)CN(CC(O)=O)CC(O)=O.[C:21]1([C:35]([OH:36])=[C:31]([N+:32]([O-:34])=[O:33])[CH:30]=[C:26]([N+:27]([O-:29])=[O:28])[CH:25]=1)[N+:22]([O-:24])=[O:23].[Fe:37]>CO>[C:31]1([C:35]([O-:36])=[C:21]([N+:22]([O-:24])=[O:23])[CH:25]=[C:26]([N+:27]([O-:29])=[O:28])[CH:30]=1)[N+:32]([O-:34])=[O:33].[Fe+2:37].[C:31]1([C:35]([O-:36])=[C:21]([N+:22]([O-:24])=[O:23])[CH:25]=[C:26]([N+:27]([O-:29])=[O:28])[CH:30]=1)[N+:32]([O-:34])=[O:33]

Participants

5

Reactant 3

HCID 6049Ethylenediaminetetraacetic AcidHCID 6954Picric Acid3×HCID 23925Iron

Product 1

HCID 12056057Ferrous picrate

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent2×

Procedure

According to one method aspect of the present invention, additives may be prepared by the steps of (i) combining EDTA and amine in a suitable solvent such as methanol; (ii) adding picric acid to a suitable solvent such as methanol to make a solution of picric acid; (iii) adding a source of +2 iron to the picric acid solution of step (ii) with stirring to obtain a green iron picrate solution; and (iv) adding portions of the solution of step (i) to the green iron picrate solution of step (iii) with agitation until the green color disappears and a clear yellow solution is obtained. The color change of step (iv) is rapid, taking place immediately upon sufficient addition of the solution of step (i).

Sources & evidence

ORD record
ord-f0178fec60b14777859142670c3ddb73
Source dataset
uspto-grants-1981_05
Patent number
US04265639

Reaction notes

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