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= 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.
- 3-dihydroxybenzoic acid stability constants oligomers
- Copper(II) 2
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Materials Chemistry