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3829538 
Journal Article 
Kinetic and Mechanistic Studies of Hydrolysis of 2-Ethyl-6-methylaniline Phosphate Tri-Ester in Acidic Medium 
Tiwari, BK; Singh, R; Thakur, D; Sharma, G; Chand, S; Saxena, A 
2009 
Yes 
Asian Journal of Chemistry
ISSN: 0970-7077
EISSN: 0975-427X 
21 
1 
47-56 
English 
WOS:000264758800007 
Kinetic investigation of the hydrolysis of 2-ethyl-6-methylaniline phosphate tri-ester has been carried out in 0.1 to 6.0 mol dm(-3) HCl and pH 1.24 to 7.46 at 97 +/- 0.5 degrees C in 30 % (v/v) aqueous dioxane mixture. Concentration of tri-ester in all kinetic runs was 5.0 x 10(-4) mol dm(-3). The rate of hydrolysis was determined by measuring the rate of appearance of inorganic phosphate by Allen's modified colorimetric method. Pseudo first order rate coefficient have been calculated. Conjugate acid, neutral and mononegative species have been found to be reactive and contribute in over all rate. The rate coefficients estimated fairly in good agreement with the observed rates. Bond fission, molecularity and order of reaction have been suported by Arrhenius parameters, Zucker-Hammett hypothesis, concentration, solvent effect, etc. Comparative isokinetic rate data of similarly substituted other amino phosphate tri-ester, supported P-N bond fission. 
Kinetics; 2-Ethyl-6-methylaniline Phosphate tri-ester; Acidic medium 
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