Effects of pure Acoh and mixed AcOH-CS (CS = CH3CN And THF) solvents on the rate of cleavage of Phthalic Anhydride (PAn)

Ariffin, A. and Khan, M.N. and Damit, E.F. and Yusof, N.S.M. (2012) Effects of pure Acoh and mixed AcOH-CS (CS = CH3CN And THF) solvents on the rate of cleavage of Phthalic Anhydride (PAn). Journal of the Iranian Chemical Society, 9 (5). pp. 723-727. ISSN 1735-207X

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Official URL: http://link.springer.com/article/10.1007%2Fs13738-...

Abstract

The values of pseudo-first-order rate constants (k (obs)) for the acetolysis of phthalic anhydride (PAn) increase from 6.60 x 10(-7) to 31.5 x 10(-7) s(-1) with the increase in temperature from 30 to 50 A degrees C. These values of k (obs) give activation parameters a dagger H* and a dagger S* as 14.4 +/- A 0.4 kcal mol(-1) and -39.1 +/- A 1.3 cal K-1 mol(-1), respectively. The values of k (obs) remain essentially unchanged with the increase in the content of CS (CS = CH3CN or THF) from 0 to 40 % v/v in mixed AcOH-CS solvents. These observations have been explained qualitatively.

Item Type: Article
Additional Information: Department of Chemistry, Faculty of Science Building, University of Malaya, 50603 Kuala Lumpur, MALAYSIA
Uncontrolled Keywords: Phthalic anhydride (PAn); Rate of acetolysis of PAn; Kinetic study ∆H* and ∆S* for acetolysis; Effects of mixed glacial acetic acid–CS solvents (CS = CH3CN and THF)
Subjects: Q Science > QD Chemistry
Divisions: Faculty of Science > Dept of Chemistry
Depositing User: Miss Malisa Diana
Date Deposited: 03 Jul 2013 04:10
Last Modified: 13 Mar 2015 06:13
URI: http://eprints.um.edu.my/id/eprint/8095

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