Kinetic Study of Beckmann rearrangement of Anti Benzaldoximes in Perchloric acid


Abstract The paper deals with kinetic data of Beckmann rearrangement of substituted anti benzaldoxime to substituted benzoic acid and ammonia by action of perchloric acid in 10% ethanol by volume . A spectrophotometric method was used for this investigation , by following the decay absorbances of benzaldoximes at the proper analytical wavelengths . The reaction was found to obey a pseudo first order kinetic with respect to oxime . The observed rate constants k were evaluated in the temperature in the range 323-353 K and found to depend on temperature and donor or acceptor property of the substituent as well as its position on the aromatic rings . Finally the activation parameters for Beckmann rearrangement reactions were calculated and discussed .