Asian Journal of Research in Chemistry

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Kinetics Study of Co-Solvent effect in Alkaline Hydrolysis of Diethyl Pathalate Ester


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1 Department of Chemistry, Teerthanker Mahaveer University, Moradabad, India, India
     

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The base catalyzed hydrolysis of diethyl pathalate has been carried out titrometically in water-ethanol binary solvent mixture covering range of 30 to 70% (v/v) of solvent composition at different Temperature (20 to 400C). The reaction followed second order rate constant which decreases with increase of solvent composition. The salvation and desolvation concept are used to explain the solvent influence on rate and mechanism is the reaction. The relation between changes in dielectric constant due to variation of reaction mixture and change in specific rate constant has been explained on the basis of electrostatic and non-electrostatic contribution of solvent mixture. Calculated value of Iso-composition activation energy is found to be increases with increase of solvent composition. The thermodynamic parameters (G*, H*&S*) has been determined with help of Wynne Jone and Eyring equation which show the great dependency on solvent composition.

Keywords

Diethyl Pathalate, Water-ethanol, Hydrolysis, kinetic solvent effect,. Iso-composition activation energy.
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  • D. J Cram, B. Rickborn, C. A. Kingsbury, and P. Haberfield, “ Electrophilic Substitution at Saturated Carbon. XIII. Solvent Control of Rate of Acid-Base Reactions that Involve the CarbonHydrogen Bond”,. J. Am. Chem. Soc., 1961, 83, 3678.

  • C. Reichardt, “Solvent and Solvent Effects in Organic Chemistry”, 3rd edn, 2003,Wiley-VCH, Weinheim

  • S. Rose´s, M., Ra` fols, C., J. Ortega, and E Bosch, “Solute– solvent and solvent–solvent interactions in binary solvent mixtures. Part 1. A comparison of several preferential solvation models for describing ET(30) polarity of bipolar hydrogen bond acceptor-cosolvent mixtures”, J. Chem. Soc., Perkin Trans. 2,1995, P1607

  • U. Buhvestov, F. Rived, C. Ra` fols, E. Bosch, and M. Rose´ s, “Solute–solvent and solvent–solvent interactions in binary solvent mixtures. Part 7. Comparison of the enhancement of the water structure in alcohol–water mixtures measured by solvatochromic indicators”, J. Phys. Org. Chem., 1998, 11,P 185.

  • K. Herodes, I. Leito, I Koppel, and M. Rose´ s, “Solute–solvent and solvent–solvent interactions in binary solvent mixtures. Part 8.The E T(30) polarity of binary mixtures of formamides with hydroxylic solvents”, J. Phys. Org. Chem., 1999,12, P109

  • E.D. Hughes, C.K. Ingold. “Mechanism of substitution at a saturated carbon atom. Part IV. A discussion of constitutional and solvent effects on the mechanism, kinetics, velocity, and orientation of substitution”. Journal of the Chemical Society (Resumed). 1935, PP 244-255.

  • E. Tommila, A. Nurro, and A. Murem, Sumen Kemistilehti 35, 255 (1935).

  • M.S. Metwally, “Kinetic study of resin catalysed hydrolysis of ethyl propinoate in aqueous solvent system”, J. Reaction Kinetic Catalyst &letters. Vol-47 No-2,1992. Pp319-326.

  • AKSingh,“Kinetic and solvent effect and mechanism of hydrolysis of ethyl caprylate ester in aquous organic solvent media”. Asian j.Of Research in Chemistry, Vol-14,issue-6. 2021, pp435-437.

  • Lallan Singh, AK .Gupta, RT Sıngh, DK .Varma, RC. Jha., “Effect of DMSO on kinetics behaviour of alkaline Catalysed hydrolysis of methyl salicylate”, J. Reaction Kinetic Catalyst &letters. Vol24 ,No1-2,1984. Pp161-165.

  • G. AKLOF, Dielectric Constants Of Some Organic Solvent-Water Mixtures At Various Temperatur J. Am. Chem. Soc 54 11: 1932, pp4125–4139.

  • K.J. Laidler and P A. Landskroener 1956 Trans Faraday Soc. 52, 200

  • RK. Wolfod., “Kinetic of acid hydrolysis of acetal in dimethyl sulfoxide-water solvents at 150,250 and 350”, J of physıcal chemıstry. 68,1964. PP3392-3398.

  • Arjuman Bano, AK., Singh, “A kinetic study of dipolar proticsolvent in alkaline hydrolysis of ethyl nicotinate in water-ethanol media,” A solvent effect. J of Ultra Chemistry. Vol-13(6), 2017,

  • pp145-150.

  • A K. Singh Arjuman Bano, “Kinetics and Solvent effect on Aquodipolar protic organic-solvent system of Hexanoate ester,” Asian journal of Research in Chemistry, 12(6)Nov 2019, pp 341-344 .


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  • Kinetics Study of Co-Solvent effect in Alkaline Hydrolysis of Diethyl Pathalate Ester

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Authors

A K Singh
Department of Chemistry, Teerthanker Mahaveer University, Moradabad, India, India

Abstract


The base catalyzed hydrolysis of diethyl pathalate has been carried out titrometically in water-ethanol binary solvent mixture covering range of 30 to 70% (v/v) of solvent composition at different Temperature (20 to 400C). The reaction followed second order rate constant which decreases with increase of solvent composition. The salvation and desolvation concept are used to explain the solvent influence on rate and mechanism is the reaction. The relation between changes in dielectric constant due to variation of reaction mixture and change in specific rate constant has been explained on the basis of electrostatic and non-electrostatic contribution of solvent mixture. Calculated value of Iso-composition activation energy is found to be increases with increase of solvent composition. The thermodynamic parameters (G*, H*&S*) has been determined with help of Wynne Jone and Eyring equation which show the great dependency on solvent composition.

Keywords


Diethyl Pathalate, Water-ethanol, Hydrolysis, kinetic solvent effect,. Iso-composition activation energy.

References