A kinetics study of dipolar protic solvent in alkaline hydrolysis of ethyl Nicotinate in water-ethanol media- A Solvent effect

Bano, Arjuman; Singh, A. K.

doi:10.22147/juc/130603

juc

2017

DOI: 10.22147/juc/130603

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A kinetics study of dipolar protic solvent in alkaline hydrolysis of ethyl Nicotinate in water-ethanol media- A Solvent effect

Arjuman Bano¹,

A. K. Singh²

Abstract: A kinetic study of dipolar protic solvent on ethyl nicotinate was highlighted by carrying out the varying composition from 30% to 70% (v/v) at five different temperature ranging from 20 o c to 40 0 c. The specific rate constant values of the reaction found to decrease with gradual addition of ethyl alcohol in water-ethanol media. The value of iso composition activation energy (Ec) and iso-dielectric energy (E D ) values of the reaction were found increase with increase proportion of ethyl alcohol in water-etha… Show more

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Cited by 4 publications

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

Singh

2022

AJRC

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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.

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

Singh

2022

AJRC

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Water-DMSO Co–Solvent effect and kinetics of acid catalyzed Hydrolysis of butyl formate and Influence on Activation Parameters

Singh

2023

AJRC

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The acid catalyzed hydrolysis of butyl formate in presence of 0.1N-HCI in water and the presence of water-DMSO mixture containing up to 30-70% (v/v) was studied over the temperature ranging from 20-400C. The rate of reaction decreases with decrease of water content of the solvent mixture and reached minima at about 70% of organic solvent. The number of water molecule associated with activated complex was showing decrease in trend with increase of temperature, is an indication of change in mechanism from unimolecular to bimolecular in reaction media. The parameters of thermodynamic activation were also calculated and discussed in terms of solvent effect with help of plots of ΔH* versus ΔS*, the isokinetic temperature was calculated and found to be greater than 300.

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Mechanism and solvent kinetics of acid catalysed Hydrolysis of Propyl Methanoate in Binary-Solvent system of water and Propanol-2

Singh,

Kr. Vishnoi

2023

AJRC

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The kinetic solvent effect on the rate of reaction for the acid catalysed hydrolysis of propyl methanoate has been studed in different compositions (30 to70%) of aqueous mixture of prpanol-2(v/v) over the different ranges of temperature(20 to 400 c). The reaction followed second order kimnetics. With addition of solvent the rate of reaction decreases progressively. The energy of activation (Ec) is calculated with the help of Arrhenius plots with reciprocal of absolute temperature. Linear relation has been observed for the plots of logk against different dielectric values of propanol-2. The effect of solvent on thermodynamic parameter has also been discussed and calculated with wynne Jones and Eyring equation. The nature of solvent-solute interaction has been explained by calculation Iso-kinetic temperature.

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A kinetics study of dipolar protic solvent in alkaline hydrolysis of ethyl Nicotinate in water-ethanol media- A Solvent effect

Cited by 4 publications

References 1 publication

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

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

Water-DMSO Co–Solvent effect and kinetics of acid catalyzed Hydrolysis of butyl formate and Influence on Activation Parameters

Mechanism and solvent kinetics of acid catalysed Hydrolysis of Propyl Methanoate in Binary-Solvent system of water and Propanol-2

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