Kinetics of the chromic acid oxidation of alcohols in aqueous acetone solutions

1968 ◽  
Vol 46 (3) ◽  
pp. 441-449 ◽  
Author(s):  
Donald G. Lee ◽  
William L. Downey ◽  
R. Michael Maass
Keyword(s):  
Acetic Acid ◽  
Chromic Acid ◽  
Aqueous Acetone ◽  
Acid Oxidation ◽  
Aqueous Acetic Acid ◽  
Acid Solutions ◽  
Deuterium Isotope Effect ◽  
Chromic Acid Oxidation ◽  
Oxidation Of Alcohols ◽  
Kinetics Of

The rate law for oxidation of 2-propanol by chromic acid in aqueous acetone solutions has been found to be V = k3 [Cr(VI)| [2-propanol]ho, with the magnitude of k3 being over 700 times as great in 93.3% acetone as it is in water. In other respects (primary deuterium isotope effect, Hammett "rho" value, and salt effects) the general features of the reaction strongly resemble those observed in aqueous acetic acid solutions.

Kinetics of the Oxidation of Aliphatic Aldehydes by Chromic Acid

1971 ◽  
Vol 26 (5) ◽  
pp. 383-385 ◽  
Author(s):  
C. Goswami ◽  
K. K. Banerji
Keyword(s):  
Acetic Acid ◽  
Chromic Acid ◽  
Activation Parameters ◽  
Acid Oxidation ◽  
First Order ◽  
Chromic Acid Oxidation ◽  
Rate Determining Step ◽  
Reversible Formation ◽  
Kinetics Of ◽  
Chromate Ion

The kinetics of chromic acid oxidation of propanaldehyde, butyraldehyde and isobutyraldehyde in aq. acetic acid have been studied. The product of the oxidation is the corresponding carboxylic acid. The reaction is of first order with respect to each the acid chromate ion, HCrO4⊖, and the aldehyde but of second order to hydrogen ion. The rate increases with proportion of acetic acid in the solution. The activation parameters for the oxidation and enolisation reactions have been evaluated. The rate of enolisation under similar condition is less than that of oxidation. A mechanism in which the first step is the rapid reversible formation of a chromate ester followed by a hydrideion transfer in the rate determining step has been suggested.

Chromic acid oxidation of benzhydrols-kinetics and mechanism

1977 ◽  
Vol 30 (2) ◽  
pp. 325 ◽  
Author(s):  
VMS Ramanujam ◽  
N Venkatasubramanian ◽  
S Sundaram
Keyword(s):  
Chromic Acid ◽  
Activation Parameters ◽  
Acid Oxidation ◽  
P Value ◽  
Aqueous Acetic Acid ◽  
Isokinetic Relationship ◽  
Hydride Ion ◽  
Chromium Vi ◽  
Chromic Acid Oxidation ◽  
Kinetics Of

The kinetics of the oxidation of benzhydrol (diphenylmethanol) and several of its substituents by chromium(VI) oxide in aqueous acetic acid have been studied in detail. The rate of oxidation is expressed as ��������������������� v = k3[ArAr'CHOH][CrVI][H+]2 The effect of ring substituents on the rate gives a p+ value of -0.546 (r = 0.959) pointing to the development of an electron-deficient centre in the transition state. The oxidation of benzhydrol[α-D] proceeds 6.5 times slower than that of its protio analogue at 55°C. From the Arrhenius plots, activation parameters have beep evaluated and the isokinetic relationship has been analysed. The results are discussed in terms of a mechanism involving a rate-determining loss of hydride ion from the α-carbon of benzhydroxy chromate ester.

The kinetics of the chromic acid oxidation of diphenylmethane

Tetrahedron ◽  
1960 ◽  
Vol 8 (3-4) ◽  
pp. 313-335 ◽  
Author(s):  
K.B. Wiberg ◽  
R.J. Evans
Keyword(s):  
Chromic Acid ◽  
Acid Oxidation ◽  
Chromic Acid Oxidation ◽  
Kinetics Of
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