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Kinetic investigation on the oxidation of nitrite by oxochromium(V) ion in aqueous and micellar systems
Author(s) -
Kanthimathi Mookandi,
Nair Balachandran Unni
Publication year - 2003
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.10174
Subject(s) - chemistry , aqueous solution , micelle , pulmonary surfactant , redox , cationic polymerization , sodium dodecyl sulfate , inorganic chemistry , sodium nitrite , nitrite , chloride , critical micelle concentration , electron transfer , kinetics , ion , photochemistry , polymer chemistry , organic chemistry , nitrate , biochemistry , physics , quantum mechanics
Abstract The kinetics of oxidation of nitrite by [O = Cr V (5‐chlorosalen)] + complex has been studied spectrophotometrically at [Cr V ] = 0.5 × 10 −3 M, [NO 2 − ] = 0.01–0.1 M, [H + ] = 0.0001–0.05 M, I = 0.15 M, and T = 25°C in the presence of cationic surfactant, cetyl pyridium chloride (CPC), and anionic surfactant, sodium dodecyl sulfate (SDS),in aqueous acidic medium. The oxygen atom transfer reaction from O = Cr V to nitrite ion is influenced by the ionic nature of the micelle. The redox reaction is accelerated in presence of CPC and slowed down by 40 times in presence of SDS. The mechanism of the reaction involves an inner‐sphere process involving the formation of an intermediate followed by oxo transfer process. © 2003 Wiley Periodicals, Inc. Int J Chem Kinet 36: 79–86 2004