ABSTRACT:
The hydrolysis of Amyl Methanoate was investigated volumetrically in water-EG media for kinetic studies at various composition having 30 to 80% of EG at five different temperature 20 to 400c.The following conclusion were reached: first, the depletion of rate with gradual addition of organic co-solvent with increasing temperature of reaction media has been explained in term of salvation of initial and transition states to different extents. Secondly, the changes in value of iso-composition and iso-dielectric Activation energy of the reaction media has also been explained in light of salvation and desolvation of initial and transition states to different extant. The increase in numerical values of (?G*) with decrease in enthalpy of activation (?H*) and entropy of activation (?S*) of the reaction, reveals that ethylene glycol acts as entropy control solvent. Effect of ionic strength and [H+] ion on the reaction on the rate has also been studied and it is concluded that acid catalised hydrolysis of amyl methanoate is ion- dipolar reaction and it follows AAC2 mechanistic pathways of water-EG media. From the evaluated values of increasing number of water molecule associated in the formation of activated complex inferred that in presence of ethylene glycol, the bio molecular mechanistic pathways of the reaction has been change to unimolecular. Reaction is entropy controlled because numerical values of (?G*) increase with simultaneous decrease in (?H*) and (?S*) values of the reaction media.
Cite this article:
A K Singh. Effect of Solvent on Kinetics of acid Catalyzed solvolysis of Amyl Methanoate Formate in water-ethylene glycol (EG) mixture. Asian J. Research Chem. 2020; 13(6):469-472. doi: 10.5958/0974-4150.2020.00083.8
Cite(Electronic):
A K Singh. Effect of Solvent on Kinetics of acid Catalyzed solvolysis of Amyl Methanoate Formate in water-ethylene glycol (EG) mixture. Asian J. Research Chem. 2020; 13(6):469-472. doi: 10.5958/0974-4150.2020.00083.8 Available on: https://www.ajrconline.org/AbstractView.aspx?PID=2020-13-6-10
REFERENCE:
1. Franks F., Water: A comprensive Treatrise Plenum Press New York (1973) vol-2 p422.
2. Akerlof. G. Dielectric constant of some organic solvent-water mixture at various temperature. J amm. Chem Soc. (1932), 54, 11, pp4125-4139.
3. Akerlof. G. and Oliver., A Shorter The dielectric constant of dioxane-water mixture between 0 and 80°C. J Amm. Chem Soc (1936), 58,7, pp1241-1243.
4. Singh A K. “Study of Solvent effect of Protic solvent on Solvolysis of Hexanoate ester and Activation parameters.” Asian journal of Research in Chemistry, 12(2) Nov 2020, pp 216-218
5. Singh A K. Arjuman Bano,.“Kinetics and Solvent effect on Aquo-dipolar protic organic-solvent system of Hexanoate ester.” Asian journal of Research in Chemistry, 12(6) Nov 2019, pp 341-344
6. Singh AK. Arjuman Bano., Solvent effect and kinetics on ethyl benzoate in aqueous solvent system. International Journal of Chemical Science, Volume 3; Issue 5; September 2019; Page No. 26-28
7. Sharma Sangita et al. Kinetic study of specific base catalysed hydrolysis of Ethyl Acrylate in water-Ethanol binary system. Russian Journal of physical chemistry A. Vol. 87, No. 5, 2013. Pp730-736
8. Magda F Fathalla., Kinetics of reaction of 2-chloro-quinosalin with Hydroxide ion in CAN- H2O and DMSO- H2O binary solvent mixture,” Journal of solution chemistry, 40, 1258-70,2011
9. Singh A K., Kinetics and solvent effect on activation parameter of aquo-propanol solvent system for acid catalyzed solvolysis of propyl formate. International Journal of Chemical Science, vol-3, issue-4, July, 2019 pp85-88
10. Singh A K., Solvent effect and kinetics on solvolysis of propyl formate in water-propanol solvent mixture. International Journal of Chemical Science, vol-3, issue-4, July, 2019 pp82-84.
11. Parker A J., The effect of salvation on the properties of anion in dipolar Q Rev Issue-2(1962), p163.
12. Roberts D. D., Solvent effect III. The influence of aqueous dimethyl solfoxide on alkyl benzoate ester saponification reaction. J Org. Chem. (1966,31,12,) pp4037-4041. aprotic solvents.
13. Hughes E.D. and Ingold C.K,” Mechanism of substitution at saturated carbon atom part IV, A discussion of constitution and solvent effect on mechanism, kinetics, velocity, and orientation of substitution”. j chem. Soc 1935, 244- 255.
14. Laidler K.J and Landskroener P A,: Trans Faraday Soc. 52, 200 1956.
15. Singh AK. Kinetics and solvent effect on activation parameter of aquo-propanol solvent system for acid catalyzed solvolysis of propyl formate. International Journal of Chemical Science vol-3, issue-4, July, 2019 pp85-88.
16. Singh A.K. Solvent effect and kinetics on solvolysis of propyl formate in water-propanol solvent mixture. International Journal of Chemical Science vol-3, issue-4, July, 2019 pp82-84.
17. Wolford, R K.: “Kinetics of the Acid-Catalyzed Hydrolysis of Acetal in Dimethyl Sulfoxide- Water Solvents at 15, 25, and 35°C” J. Phys.Chem., 1964, 68 (11), pp 3392–3398J. Phys.chem. 68, 3392, 1964.
18. Singh AK. Arjuman Bano., Solvent effect and kinetics on ethyl benzoate in aqueous solvent system. International Journal of Chemical Science, Volume 3; Issue 5; September 2019; Page No. 26-28
19. R.E. Robertson, “A survey of thermodynamic parameter for solvolysis in water”, Prog. Phy.Org. chem. 4, 1967 pp213
20. Robertson. R E., Heppolitite. R L, Scott J.M.W: A survey of thermodynamic parameter for the solvolysis of water. Canad. Journal of chemistry. 37(4) pp803-824.
21. Singh A K., “The influence of solvent on solvolysis of ethyl cinnamate in water-acetone mixed solvent system”. Chemical science journal, vol-8 issue-1, March, 2017 pp 1-4