Effects of pure AcOH and mixed AcOH-CS (CS = CH3CN and THF) solvents on the rate of cleavage of phthalic anhydride (PAn)

被引：0
|
作者：
Damit, Emmy Fadhiza [1 ]
Yusof, Nor Saadah M. [1 ]
Ariffin, Azhar [1 ]
Khan, M. Niyaz [1 ]
机构：
[1] Univ Malaya, Dept Chem, Fac Sci, Kuala Lumpur 50603, Malaysia
来源：
JOURNAL OF THE IRANIAN CHEMICAL SOCIETY | 2012年 / 9卷 / 05期
关键词：
Phthalic anhydride (PAn); Rate of acetolysis of PAn; Kinetic study; Delta H* and Delta S* for acetolysis; Effects of mixed glacial acetic acid-CS solvents (CS = CH3CN and THF); IONIZED PHENYL SALICYLATE; AQUEOUS-ORGANIC-SOLVENTS; CATIONIC MICELLES; MECHANISM; KINETICS; ACID; CYCLIZATION;
D O I：
10.1007/s13738-012-0084-5
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
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.
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页码：723 / 727
页数：5
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