Kinetics and mechanism of oxidation of D-Galactose and D-Maltose with potassium permanganate in acidic medium by spectrophotometry

被引：0

作者：

Azmat, Rafia ^{[1
]}

Naz, Raheela ^{[1
]}

Khalil, Amna ^{[1
]}

Uddin, Fahim ^{[1
]}

机构：

[1] Jinnah Univ Women, Dept Chem, Karachi 74600, Pakistan

来源：

ASIAN JOURNAL OF CHEMISTRY | 2008年 / 20卷 / 02期

关键词：

D-galactose and D-maltose; permanganate ion; absorbance; first order and catalyst;

D O I：

暂无

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Oxidation of D-galactose and D-maltose with permanganate ion (MnO4-) as oxidant was observed in acidic medium by visible spectrophotometric method. The rate of reaction was followed by the change in absorbance of oxidant at 545 run. The influence of different experimental parameters, such as change in concentration of D-galactose and D-maltose, MnO4-, H+ and reaction temperature were investigated. The oxidation reaction was observed identical first order kinetics with respect to substrate and permanganate ion. A positive effect of H+ was found whereas change in ionic strength (mu) has no effect on oxidation velocity. It was observed that rate of oxidation of maltose was Much slower in absence of catalyst which was increased after the addition of mercuric acetate while in case of galactose reaction proceeds with Out catalyst. The reaction were investigated at different temperatures to evaluate various activation parameters. A suitable mechanism consistent with experimental finding has been proposed.

引用

页码：829 / 837

页数：9

共 21 条

[1] KINETICS AND MECHANISM OF THE OXIDATION OF D-MANNOSE WITH PYRIDINIUM CHLOROCHROMATE [J].

AGARWAL, GL ;

TIWARI, S .

REACTION KINETICS AND CATALYSIS LETTERS, 1993, 49 (02) :361-367

[2]

AZMAT R, 2005, NUCLEUS, V42, P177

[3] Glucose oxidation in a three-phase stirred airlift reactor: experiments and model [J].

Bang, W ;

Lu, X ;

Duquenne, AM ;

Nikov, I ;

Bascoul, A .

CATALYSIS TODAY, 1999, 48 (1-4) :125-130

[4]

Fadnis AG, 2000, J INDIAN CHEM SOC, V77, P235

[5]

Ghosh PK, 2000, J INDIAN CHEM SOC, V77, P109

[6] Oxidation of D-glucose to D-gluconic and D-glucaric acids catalyzed by sodium nitrite [J].

Grigor'eva, IA ;

Chernaya, SS ;

Trusov, SR .

RUSSIAN JOURNAL OF APPLIED CHEMISTRY, 2001, 74 (12) :2021-2026

[7] Kinetics and mechanism of the ruthenium(III) catalysed oxidation of reducing sugars by chloramine-T in alkaline medium [J].

Kambo, N ;

Upadhyay, SK .

TRANSITION METAL CHEMISTRY, 2000, 25 (04) :461-464

[8] Bismuth as an additive modifying the selectivity of palladium catalysts [J].

Karski, S ;

Witonska, I .

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 2003, 191 (01) :87-92

[9] KINETICS AND MECHANISM OF OXIDATION OF SOME REDUCING SUGARS BY DIPERIODATOARGENTATE(III) IN ALKALINE-MEDIUM [J].

KRISHNA, KV ;

RAO, PJP .

TRANSITION METAL CHEMISTRY, 1995, 20 (04) :344-346

[10]

LAIXIN ZY, 2001, QIONG HUAGONG SHIKAN, V15, P42

← 1 2 3 →