Stability constants for complex formation between cobalt(II), nickel(II), copper(II) and 2,3-diaminopropionic acid, 2,4-diaminobutyric acid, ornithine, lysine, and arginine
- 1 January 1976
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 1,p. 42-46
- https://doi.org/10.1039/dt9760000042
Abstract
The formation constants of the complexes formed between H+, Co2+, Ni2+, and Cu2+ and DL-2,3-diaminopropionic acid, L-2,4-diaminobutyric acid, L-ornithine, L-lysine, and L-arginine have been measured potentiometrically at 25 °C and I= 0.10 mol dm–3(K[NO3]). At intermediate pH values the equilibria have been shown to include a complicated range of protonated complexes with ligands behaving as either bi-or tri-dentate ligands depending on the pH and separation of the nitrogen donor atoms. Probable structures for the various complexes are discussed.Keywords
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