Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/44028
Title: Oxidative kinetics and structure reactivity correlation in bromate oxidation of acetophenones in acid medium
Authors: Murthy, N Krishna
Reddy, Ch Sanjeeva
Sundaram, E V
Issue Date: Oct-1993
Publisher: NISCAIR-CSIR, India
Abstract: Kinetics of acid bromate oxidation of acetophenone and eight para- and meta-substituted acetophenones have been studied in acetic acid (40-90%). The reaction is first order each in [oxidant] and [substrate] and the rate increases with aciditity of the medium. A decrease in the proportion of acetic acid in the reaction mixture decreases the rate. The effect of substituent on the rate has been evaluated and the rate constants correlated well with σ+, the Okamato-Br-own's constant, suggesting a cross-conjugation and/or a resonance interaction between the substituent and the reaction centre. The reaction is susceptible to polar influences and the reaction constant (ρ) evaluated at various temperatures and solvent compositions is ~0.8 ± 0.02 indicating an electron-deficient transition state. The Yukawa's enhanced resonance parameter (γ) is calculated to ~0.82 and discussed.
Page(s): 899-902
URI: http://nopr.niscair.res.in/handle/123456789/44028
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.32A(10) [October 1993]

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