Mechanism of complex formation between [AuCl4](-) and L-methionine
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Аутори
Vujačić, Ana V.Savić, Jasmina
Sovilj, Sofija P.
Szecsenyi, K. Meszaros
Todorović, N.
Petković, Marijana
Vasić, Vesna M.
Чланак у часопису
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Приказ свих података о документуАпстракт
The kinetics of the reaction between the tetrachloroaurate(III) ion and L-methionine (L-Met) (0.1 M HClO4, pH 1.0-2.5) have been studied spectrophotometrically using a stopped-flow technique at different temperatures. Initially, the fast substitution reaction was ascribed to the formation of the short-lived square-planar Au(III)-(L-Met) that was followed by the replacement of a Cl- ligand and a subsequent, slower reduction to Au(I)-(L-Met). This is an intermolecular process, involving attack on the [AuCl4](-) Complex by an outer-sphere L-methionine. The activation parameters (Delta H-not equal and Delta S-not equal) for substitution and reduction were determined. IR spectroscopy indicates that L-methionine acts as a bidentate ligand, most likely coordinating via the S and N atoms, while H-1 and C-13 NMR data indicate methionine sulfoxide as the final product. Finally, the components of the reaction were treated thermally in order to investigate the solid phase synthesis of the resultin...g complex. (C) 2008 Elsevier Ltd. All rights reserved.
Кључне речи:
Gold(III) / L-Methionine / Complex formation / KineticsИзвор:
Polyhedron, 2009, 28, 3, 593-599Финансирање / пројекти:
- Истраживање механизма интеракција биолошки активних једињења са биомолекулима (RS-MESTD-MPN2006-2010-142051)
DOI: 10.1016/j.poly.2008.11.045
ISSN: 0277-5387
WoS: 000264236000027
Scopus: 2-s2.0-59649108170
Колекције
Институција/група
VinčaTY - JOUR AU - Vujačić, Ana V. AU - Savić, Jasmina AU - Sovilj, Sofija P. AU - Szecsenyi, K. Meszaros AU - Todorović, N. AU - Petković, Marijana AU - Vasić, Vesna M. PY - 2009 UR - https://vinar.vin.bg.ac.rs/handle/123456789/3653 AB - The kinetics of the reaction between the tetrachloroaurate(III) ion and L-methionine (L-Met) (0.1 M HClO4, pH 1.0-2.5) have been studied spectrophotometrically using a stopped-flow technique at different temperatures. Initially, the fast substitution reaction was ascribed to the formation of the short-lived square-planar Au(III)-(L-Met) that was followed by the replacement of a Cl- ligand and a subsequent, slower reduction to Au(I)-(L-Met). This is an intermolecular process, involving attack on the [AuCl4](-) Complex by an outer-sphere L-methionine. The activation parameters (Delta H-not equal and Delta S-not equal) for substitution and reduction were determined. IR spectroscopy indicates that L-methionine acts as a bidentate ligand, most likely coordinating via the S and N atoms, while H-1 and C-13 NMR data indicate methionine sulfoxide as the final product. Finally, the components of the reaction were treated thermally in order to investigate the solid phase synthesis of the resulting complex. (C) 2008 Elsevier Ltd. All rights reserved. T2 - Polyhedron T1 - Mechanism of complex formation between [AuCl4](-) and L-methionine VL - 28 IS - 3 SP - 593 EP - 599 DO - 10.1016/j.poly.2008.11.045 ER -
@article{ author = "Vujačić, Ana V. and Savić, Jasmina and Sovilj, Sofija P. and Szecsenyi, K. Meszaros and Todorović, N. and Petković, Marijana and Vasić, Vesna M.", year = "2009", abstract = "The kinetics of the reaction between the tetrachloroaurate(III) ion and L-methionine (L-Met) (0.1 M HClO4, pH 1.0-2.5) have been studied spectrophotometrically using a stopped-flow technique at different temperatures. Initially, the fast substitution reaction was ascribed to the formation of the short-lived square-planar Au(III)-(L-Met) that was followed by the replacement of a Cl- ligand and a subsequent, slower reduction to Au(I)-(L-Met). This is an intermolecular process, involving attack on the [AuCl4](-) Complex by an outer-sphere L-methionine. The activation parameters (Delta H-not equal and Delta S-not equal) for substitution and reduction were determined. IR spectroscopy indicates that L-methionine acts as a bidentate ligand, most likely coordinating via the S and N atoms, while H-1 and C-13 NMR data indicate methionine sulfoxide as the final product. Finally, the components of the reaction were treated thermally in order to investigate the solid phase synthesis of the resulting complex. (C) 2008 Elsevier Ltd. All rights reserved.", journal = "Polyhedron", title = "Mechanism of complex formation between [AuCl4](-) and L-methionine", volume = "28", number = "3", pages = "593-599", doi = "10.1016/j.poly.2008.11.045" }
Vujačić, A. V., Savić, J., Sovilj, S. P., Szecsenyi, K. M., Todorović, N., Petković, M.,& Vasić, V. M.. (2009). Mechanism of complex formation between [AuCl4](-) and L-methionine. in Polyhedron, 28(3), 593-599. https://doi.org/10.1016/j.poly.2008.11.045
Vujačić AV, Savić J, Sovilj SP, Szecsenyi KM, Todorović N, Petković M, Vasić VM. Mechanism of complex formation between [AuCl4](-) and L-methionine. in Polyhedron. 2009;28(3):593-599. doi:10.1016/j.poly.2008.11.045 .
Vujačić, Ana V., Savić, Jasmina, Sovilj, Sofija P., Szecsenyi, K. Meszaros, Todorović, N., Petković, Marijana, Vasić, Vesna M., "Mechanism of complex formation between [AuCl4](-) and L-methionine" in Polyhedron, 28, no. 3 (2009):593-599, https://doi.org/10.1016/j.poly.2008.11.045 . .