Copper(II) complexes with L-lysine and L-ornithine: Is the side-chain involved in the coordination? A thermodynamic and spectroscopic study(417 views) Conato C, Contino A, Maccarrone G, Magrì A, Remelli M, Tabbì G
Thermochim Acta (ISSN: 0040-6031), 2000 Nov 13; 362(1-2): 13-23.
Affiliations: Dipartimento di Chimica, Università di Ferrara, Via L. Borsari 46, 44100 Ferrara, Italy
Dipartimento di Scienze Chimiche, Università di Catania, Viale A. Doria 6, 95125 Catania, Italy
Istituto per lo Studio delle Sostanze Naturali di Interesse Alimentare e Chimico-Farmaceutico, CNR Sezione per lo Studio dei Metalloenzimi, Viale A. Doria 6, 95125 Catania, Italy
References: Not available.
Copper(II) complexes with L-lysine and L-ornithine: Is the side-chain involved in the coordination? A thermodynamic and spectroscopic study
The involvement of the ω-NH 2 terminal group of L-lysine and L-ornithine in the complexation of Cu(II) was investigated by means of potentiometry, calorimetry, UV-Vis and ESR. The thermodynamic parameters (ΔG 0, ΔH 0 and ΔS 0) obtained by combining the potentiometric and calorimetric data show that the two ligands complex copper(II) in a different manner, indicating that the ω-NH 2 terminal group is involved in ornithine complexes only. UV-Vis and ESR spectra further support the involvement of ornithine ω-NH 2 and provide details on the complexation geometries of the complexes of the two amino acids. (C) 2000 Elsevier Science B.V.
Copper(II) complexes with L-lysine and L-ornithine: Is the side-chain involved in the coordination? A thermodynamic and spectroscopic study
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