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Kinetics of hydrolysis of Mono-4-methyl-2nitro aniline phosphate ester in Buffer medium

The kinetics of hydrolysis of Mono-4-methyl-2-nitroaniline phosphate has been carried out in buffer solution at 50 o C in the pH range 0.00 to 7.46. The rate of reaction increases with increase in pH up to 4.17. The maximum value at pH 4.17 is due to hydrolysis via mononegative and neutral species . The neutral and monoanion have been found to be reactive. The experimental and theoretical rate values are in good agreement .The nature of molecularity of hydrolytic reaction has been decided on the basis of temperature and solvent effect. The monoester involves P-N bond fission, which is strengthened by comparative kinetic rate data.