Kinetics and mechanism of chromic acid oxidation of lactic acid

Tetrahedron ◽  
1983 ◽  
Vol 39 (1) ◽  
pp. 143-147 ◽  
Author(s):  
P.C. Samal ◽  
B.B. Pattnaik ◽  
S.Ch.Dharma Rao ◽  
S.N. Mahapatro
Keyword(s):  
Lactic Acid ◽  
Chromic Acid ◽  
Kinetics And Mechanism ◽  
Acid Oxidation ◽  
Chromic Acid Oxidation

ChemInform Abstract: CHROMIC ACID OXIDATION OF LACTIC ACID CATALYSED BY MANGANESE(II)

1975 ◽  
Vol 6 (17) ◽  
Author(s):  
A. A. BHALEKAR ◽  
C. L. JAIN ◽  
R. SHANKER ◽  
G. V. BAKORE
Keyword(s):  
Lactic Acid ◽  
Chromic Acid ◽  
Acid Oxidation ◽  
Chromic Acid Oxidation

Chromic oxidation of lactic acid in very strong acid media

1990 ◽  
Vol 68 (1) ◽  
pp. 29-32 ◽  
Author(s):  
María Piedad Alvarez-Macho ◽  
María Isabel Montequi-Martin
Keyword(s):  
Lactic Acid ◽  
Chromic Acid ◽  
Strong Acid ◽  
Mineral Acid ◽  
Acid Oxidation ◽  
Acid Media ◽  
Chromic Acid Oxidation ◽  
Rate Determining Step ◽  
Entropy Of Activation ◽  
High Concentrations

The oxidation of lactic acid by chromic acid was studied at high concentrations of HClO4, HNO3, and H2SO4. It was observed that the reaction rate depends not only on the acidity of the medium, but also on the nature of the mineral acid. The use of the Bunnett and Bunnett–Olsen criteria and the excess acidity concept allows us to propose a reaction mechanism of the A-2 type, the rate-determining step being a bimolecular process in which water participates as a nucleophile. The enthalpy and entropy of activation were determined; the decrease of the magnitude of these parameters when the acidity of the medium was increased suggests the existence of a compensation effect. Keywords: chromic acid, oxidation, lactic acid, acidic media.

Chromic Acid Oxidation of Lactic Acid Catalysed by Manganese(II)

1975 ◽  
Vol 30 (1-2) ◽  
pp. 73-78 ◽  
Author(s):  
A. A. Bhalekar ◽  
C. L. Jain ◽  
R. Shanker ◽  
G. V. Bakore
Keyword(s):  
Lactic Acid ◽  
Chromic Acid ◽  
Activation Parameters ◽  
Bond Rupture ◽  
Acid Oxidation ◽  
Chromic Acid Oxidation ◽  
Rate Limiting Step ◽  
Ph Range ◽  
Rate Limiting ◽  
Uncatalysed Reaction

Mn(II) ion catalysis in the oxidation of lactic acid by chromic acid has been investigated between the pH range 2.0 to 4.0; [H+] = 0.1 to 0.4 and [H+] ≥1.1 M. Activation parameters for catalysed and uncatalysed reactions have been evaluated. While C—H bond rupture occurs in the uncatalysed reaction, the rate limiting step of the catalysed reaction involves C-C bond fission.

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