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Copper(II) complexes of the imidazolinone herbicide imazapyr

Duda, Anna M. and Dyba, Marcin and Kozlowski, Henryk and Micera, Giovanni and Pusino, Alba (1996) Copper(II) complexes of the imidazolinone herbicide imazapyr. Journal of Agricultural and Food Chemistry, Vol. 44 (11), p. 3698-3702. eISSN 1520-5118. Article.

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DOI: 10.1021/jf9507856


The copper(II) complexes formed by the imidazolinone herbicide imazapyr [(±)-2-(4-isopropyl-4-methyl-5-oxo-2-imidazolin-2-yl)nicotinic acid] were studied in aqueous solution by potentiometric and spectroscopic techniques. Imazapyr acts as a chelating molecule and is effective over a wide pH range. The chelating set active in acidic media involves rather weak donors, namely the pyridine and imidazole nitrogens. In neutral media, the lactam site of the imidazolinone ring deprotonates and the ligand takes advantage of a rather basic nitrogen atom, which, assisted by the pyridine donor, yields stable complexes with five-coordination at the metal ion.

Item Type:Article
ID Code:1446
Uncontrolled Keywords:Imazapyr, 2-(4-isopropyl-4-methyl-5-oxo-2-imidazolin-2-yl)nicotinic acid, copper(II) complexes
Subjects:Area 03 - Scienze chimiche > CHIM/03 Chimica generale e inorganica
Area 07 - Scienze agrarie e veterinarie > AGR/13 Chimica agraria
Divisions:001 Università di Sassari > 01 Dipartimenti > Chimica
001 Università di Sassari > 01 Dipartimenti > Scienze ambientali agrarie e biotecnologie agro-alimentari
Publisher:American Chemical Society
Additional Information:Pubblicato online il 14 novembre 1996.
Deposited On:18 Aug 2009 10:05

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