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Influence of sodium dodecyl sulphate micelles on the kinetics of complex formation between Pd(H 2 O) 4 2+ and S ‐carboxymethyl‐ L ‐cysteine
Author(s) -
Vasić V. M.,
Toŝić M. S.,
Nedeljković J. M.
Publication year - 1996
Publication title -
journal of physical organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.325
H-Index - 66
eISSN - 1099-1395
pISSN - 0894-3230
DOI - 10.1002/(sici)1099-1395(199606)9:6<398::aid-poc797>3.0.co;2-z
Subject(s) - chemistry , micelle , kinetics , aqueous solution , inorganic chemistry , ionic strength , cysteine , sodium , ionic bonding , ligand (biochemistry) , complex formation , ion , organic chemistry , biochemistry , enzyme , physics , quantum mechanics , receptor
The kinetics of complex formation between Pd(H 2 O) 4 2+ and S ‐carboxymethyl‐ L ‐cysteine (SCMCH 2 ) was investigated in the presence of sodium dodecyl sulphate in the acidity range between 2 M HClO 4 and pH 5. Although the mechanism was not affected by the presence of anionic micelles, retardation (2·2 < pH < 5) and acceleration (pH < 2·2) of the complex formation were observed compared with its rate in aqueous solution. These effects were interpreted in terms of the long‐range electrostatic interactions between the negatively charged micellar surface and ligand species which can be in different ionic forms depending on the pH.