NMR analysis of the iron ligand ethylenediaminedi(o-hydroxyphenyl)acetic acid (EDDHA) employed in fertilizers.
J Agric Food Chem
; 49(8): 3527-32, 2001 Aug.
Article
in En
| MEDLINE
| ID: mdl-11513623
ABSTRACT
The exceptional efficiency of the iron chelate of ethylenediaminedi(o-hydroxyphenyl)acetic acid (o,o-EDDHA) in correcting iron chlorosis in plants and the medical applications of various metallic chelates of this compound have long been recognized. As commercial preparations of o,o-EDDHA usually contain impurities, a method for their detection is proposed. By using one- and two-dimensional nuclear magnetic resonance two impurities were identified. The structure of one of these compounds was assigned to an isomer of EDDHA containing at least one p-hydroxyphenyl moiety. The structure of the other impurity was tentatively assigned to a byproduct of the EDDHA synthesis:
2,6-di[CH(COOH)NHCH(2)CH(2)NHCH(COOH)Ar]phenol (Ar = hydroxyphenyl). Both compounds were also detected in the EDDHA extracted from a commercial iron fertilizer.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Iron Chelating Agents
/
Ethylenediamines
/
Fertilizers
Language:
En
Journal:
J Agric Food Chem
Year:
2001
Document type:
Article
Affiliation country: