Kinetics and mechanism of hydrolysis of<i>N</i>-(2′-hydroxyphenyl)phthalamic acid (<b>1</b>) and<i>N</i>-(2′-methoxyphenyl)phthalamic Acid (<b>2</b>) in a highly alkaline medium
作者:Yoke-Leng Sim、Emmy Fadhiza Damit、Azhar Ariffin、M. Niyaz Khan
DOI:10.1002/kin.20361
日期:2009.1
A kinetic study on hydrolysis of N‐(2′‐hydroxyphenyl)phthalamic acid (1), N‐(2′‐methoxyphenyl)phthalamic acid (2), and N‐(2′‐methoxyphenyl)benzamide (3) under a highly alkaline medium gives second‐order rate constants, kOH, for the reactions of HO− with 1, 2, and 3 as (4.73 ± 0.36) × 10−8 at 35°C, (2.42 ± 0.28) × 10−6 and (5.94 ± 0.23) × 10−5 M−1 s−1 at 65°C, respectively. Similar values of kOH for
N-(2'-羟苯基)邻苯二甲酸(1),N-(2'-甲氧基苯基)邻苯二甲酸(2)和N-(2'-甲氧基苯基)苯甲酰胺(3)水解的动力学研究碱性介质中给出二级速率常数,ķ OH,HO为的反应-用1,2,和3为(4.73±0.36)×10 -8在35℃,(2.42±0.28)×10 -6和在65°C下分别为(5.94±0.23)×10 -5 M -1 s -1。的相似的值ķ OH为3定性地解释了尽管苯胺和氨的pK a值相差约10 pK个单位,但N-甲基苯甲酰胺,N-甲基苯甲酰胺和N,N-二甲基苯甲酰胺。©2008 Wiley Periodicals,Inc.国际化学杂志Kinet 41:1-11,2009