Copper(II) Complexes of 2,3-Dihydroxybenzoic Acid
- 1 June 1989
- journal article
- research article
- Published by Taylor & Francis in Journal of Coordination Chemistry
- Vol. 20 (1) , 49-56
- https://doi.org/10.1080/00958978909408847
Abstract
The interaction of copper(II) with 2,3-dihydroxybenzoic acid (2,3-DHB) in aqueous solution has been investigated by means of potcntiometric and spectroscopic (EPR and electronic absorption) measurements. The complex formation equilibria in the Cu(II)-2,3-DHB system are distinctly different from those already observed with analogous ligands such as 3,4-DHB and 2,x-DHB (x α 4, 5 and 6) which form catechol- and salicylic-like complexes, respectively. The position of the three binding sites allows 2,3-DHB to exhibit both the salicylic and catechol coordination types. Besides monomeric species, oligonuclear complexes are formed in which the carboxylate groups are responsible for the metal bridging.Keywords
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