Complex formation equilibria between copper(II) and Pyridine-2-carbaldehyde
- 1 January 1971
- journal article
- Published by CSIRO Publishing in Australian Journal of Chemistry
- Vol. 24 (1) , 65-71
- https://doi.org/10.1071/ch9710065
Abstract
Copper(II) complexes of pyridine-2-carbaldehyde can be derived either from the neutral molecule (A) or from the anionic form (AOH-) of the hydrate, so that there are two sets of complexes, CuAn2+ and Cu(AOH)n2-n (n = 1, 2), related to each other as acid to conjugate base. There is also a mixed complex, CuA(AOH)+. In solution, several species are always present together in equilibrium, with the de- protonated species beginning to predominate above pH 5. The complete system of equilibria at 25� has been worked out and the constants have been evaluated by a combination of spectrophotometry and pH titrations.Keywords
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