MECHANISTIC INVESTIGATION OF OXIDATION OF A DIKETONE BY BROMAMINE-B IN ACID-MEDIUM

被引：0
|
作者：
IYENGAR, TA
MAHADEVAPPA, DS
PUTTASWAMY
机构：
[1] UNIV MYSORE,DEPT CHEM,MYSORE 570006,KARNATAKA,INDIA
[2] BANGALORE INST TECHNOL,DEPT CHEM,BANGALORE 560004,INDIA
来源：
PROCEEDINGS OF THE INDIAN ACADEMY OF SCIENCES-CHEMICAL SCIENCES | 1992年 / 104卷 / 05期
关键词：
BROMAMINE-B; ACETYLACETONE; HCL MEDIUM; OXIDATION KINETICS;
D O I：
暂无
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Oxidation of acetylacetone (AA) by bromamine-B (BAB) in HCl medium (0.1 to 0.6 mol dm-3) at constant ionic strength has been investigated at 40-degrees-C. The mtc is first order in [BAB]0 and fractional order each in [AA]0 and [H+]. The reaction is also catalysed by chloride ion. Michaelis-Menten type of kinetics is observed. Decrease in dielectric constant of medium increases the rate. A solvent isotope effect k'H2O/k'D2O = 0.96 has been noted. Activation parameters for the rate limiting step have been computed. The mechanism involves the enol form of the diketone.
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页码：611 / 618
页数：8
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