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Kinetics of the reaction of methyl 4‐nitrobenzenesul‐fonate + Br − in ethanol amine based surfactants
Author(s) -
Mohareb Michael M.,
Ghosh Kallol K.,
Palepu Rama M.
Publication year - 2006
Publication title -
international journal of chemical kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 68
eISSN - 1097-4601
pISSN - 0538-8066
DOI - 10.1002/kin.20162
Subject(s) - chemistry , bromide , pulmonary surfactant , amine gas treating , reaction rate constant , kinetics , ammonium bromide , ammonium , ethanol , inorganic chemistry , organic chemistry , biochemistry , physics , quantum mechanics
The kinetics of the reaction of methyl 4‐nitrobenzenesulfonate + Br − ions has been studied in ethanol amine based (alkyldimethylethanolammonium bromide and alkyldiethylethanolammonium bromide) surfactant solutions. The observed first‐order rate constants increase monotonically with surfactant concentration, with hydrophobic chain length and with head group bulk in a manner similar to other quaternary ammonium surfactants. The results were analyzed using the pseudophase model of micellar rate effects in conjunction with a Langmuir form to describe micellar binding of bromide ion. An attempt to estimate activation parameters of the reaction from temperature variance of micellar pseudophase rate constants has also been made. © 2006 Wiley Periodicals, Inc. Int J Chem Kinet 38: 303–308, 2006