Influence of acidity on the reaction between [PdCl(dien)](+) and L-cysteine or glutathione in the presence of sodium dodecyl sulfate micelles
Апстракт
The reaction mechanism and thermodynamic parameters of the complex formation between [PdCl(dien)](+) and sulfur-containing ligands L-cysteine and glutathione (GSH) were investigated in the presence of sodium dodecyl sulfate micelles in the pH range 0.5-3.5. The reaction rates were determined under pseudo-first-order conditions (ligand in excess) in the temperature range 276-299 K by using the stopped-flow technique. A reaction mechanism was proposed that consisted of at least two parallel paths involving protonated and zwitterionic forms of thiols. The pH effects on reaction rate were interpreted in terms of the electrostatic interactions between the negatively charged micelle surface and different ionic forms of the ligand species. The calculation of pH-dependent activation parameters (Delta H-not equal and Delta S-not equal) revealed the considerable catalytic effects on the rate of complexation. The entropy of activation is strongly negative in the presence and absence of micelles, ...which is compatible with an associative reaction mechanism. Copyright (c) 2004 John Wiley T Sons, Ltd.
Кључне речи:
complex formation / micellar catalysis / sodium dodecyl sulfate / palladium(II) / L-cysteine / glutathioneИзвор:
Journal of Physical Organic Chemistry, 2005, 18, 5, 441-447
DOI: 10.1002/poc.880
ISSN: 0894-3230
WoS: 000228492300008
Scopus: 2-s2.0-17544374488
Колекције
Институција/група
VinčaTY - JOUR AU - Vasić, Vesna M. AU - Živanović, MA AU - Čakar, Mira M. AU - Savić, Jasmina AU - Nedeljković, Jovan AU - Bugarcic, ZD PY - 2005 UR - https://vinar.vin.bg.ac.rs/handle/123456789/2879 AB - The reaction mechanism and thermodynamic parameters of the complex formation between [PdCl(dien)](+) and sulfur-containing ligands L-cysteine and glutathione (GSH) were investigated in the presence of sodium dodecyl sulfate micelles in the pH range 0.5-3.5. The reaction rates were determined under pseudo-first-order conditions (ligand in excess) in the temperature range 276-299 K by using the stopped-flow technique. A reaction mechanism was proposed that consisted of at least two parallel paths involving protonated and zwitterionic forms of thiols. The pH effects on reaction rate were interpreted in terms of the electrostatic interactions between the negatively charged micelle surface and different ionic forms of the ligand species. The calculation of pH-dependent activation parameters (Delta H-not equal and Delta S-not equal) revealed the considerable catalytic effects on the rate of complexation. The entropy of activation is strongly negative in the presence and absence of micelles, which is compatible with an associative reaction mechanism. Copyright (c) 2004 John Wiley T Sons, Ltd. T2 - Journal of Physical Organic Chemistry T1 - Influence of acidity on the reaction between [PdCl(dien)](+) and L-cysteine or glutathione in the presence of sodium dodecyl sulfate micelles VL - 18 IS - 5 SP - 441 EP - 447 DO - 10.1002/poc.880 ER -
@article{ author = "Vasić, Vesna M. and Živanović, MA and Čakar, Mira M. and Savić, Jasmina and Nedeljković, Jovan and Bugarcic, ZD", year = "2005", abstract = "The reaction mechanism and thermodynamic parameters of the complex formation between [PdCl(dien)](+) and sulfur-containing ligands L-cysteine and glutathione (GSH) were investigated in the presence of sodium dodecyl sulfate micelles in the pH range 0.5-3.5. The reaction rates were determined under pseudo-first-order conditions (ligand in excess) in the temperature range 276-299 K by using the stopped-flow technique. A reaction mechanism was proposed that consisted of at least two parallel paths involving protonated and zwitterionic forms of thiols. The pH effects on reaction rate were interpreted in terms of the electrostatic interactions between the negatively charged micelle surface and different ionic forms of the ligand species. The calculation of pH-dependent activation parameters (Delta H-not equal and Delta S-not equal) revealed the considerable catalytic effects on the rate of complexation. The entropy of activation is strongly negative in the presence and absence of micelles, which is compatible with an associative reaction mechanism. Copyright (c) 2004 John Wiley T Sons, Ltd.", journal = "Journal of Physical Organic Chemistry", title = "Influence of acidity on the reaction between [PdCl(dien)](+) and L-cysteine or glutathione in the presence of sodium dodecyl sulfate micelles", volume = "18", number = "5", pages = "441-447", doi = "10.1002/poc.880" }
Vasić, V. M., Živanović, M., Čakar, M. M., Savić, J., Nedeljković, J.,& Bugarcic, Z.. (2005). Influence of acidity on the reaction between [PdCl(dien)](+) and L-cysteine or glutathione in the presence of sodium dodecyl sulfate micelles. in Journal of Physical Organic Chemistry, 18(5), 441-447. https://doi.org/10.1002/poc.880
Vasić VM, Živanović M, Čakar MM, Savić J, Nedeljković J, Bugarcic Z. Influence of acidity on the reaction between [PdCl(dien)](+) and L-cysteine or glutathione in the presence of sodium dodecyl sulfate micelles. in Journal of Physical Organic Chemistry. 2005;18(5):441-447. doi:10.1002/poc.880 .
Vasić, Vesna M., Živanović, MA, Čakar, Mira M., Savić, Jasmina, Nedeljković, Jovan, Bugarcic, ZD, "Influence of acidity on the reaction between [PdCl(dien)](+) and L-cysteine or glutathione in the presence of sodium dodecyl sulfate micelles" in Journal of Physical Organic Chemistry, 18, no. 5 (2005):441-447, https://doi.org/10.1002/poc.880 . .