Ru(III) Catalysed Oxidation of Aminoacids by N-Bromosuccinimide in Aqueous Acetic Acid: A Kinetic Study

1988 ◽  
Vol 269O (1) ◽  
Author(s):  
P. G. Reddy ◽  
T. Kistayya ◽  
J. A. Khan ◽  
S. Kandlikar
Keyword(s):  
Acetic Acid ◽  
Kinetic Study ◽  
Aqueous Acetic Acid ◽  
Catalysed Oxidation

scholarly journals Kinetics and mechanism of meso-tetraphenylporphyriniron(III) chloride (TPP) catalysed oxidation of indole by sodium perborate

2013 ◽  
Vol 15 (2) ◽  
pp. 107-111 ◽  
Author(s):  
D. Kungumathilagam ◽  
K. Karunakaran
Keyword(s):  
Acetic Acid ◽  
Catalytic Activity ◽  
Reaction System ◽  
Kinetic Scheme ◽  
Mechanistic Study ◽  
Radical Mechanism ◽  
Aqueous Acetic Acid ◽  
Sodium Perborate ◽  
Acetic Acid Medium ◽  
Catalysed Oxidation

Developing catalyst is very significant for biologically important reactions which yield products, used as drugs. Mechanistic study on meso-tetraphenylporphyriniron(III) chloride (TPP) catalysed oxidation of indole by sodium perborate in aqueous acetic acid medium have been carried out. The reaction follows a fractional order with respect to substrate and catalyst. The order with respect to oxidant was found to be one. Increase in the percentage of acetic acid and increase in the concentration of [H+] decreased the rate. The reaction fails to initiate polymerization, and a radical mechanism is ruled out. Activation and thermodynamic parameters have been computed. A suitable kinetic scheme based on these observations has been proposed. Significant catalytic activity is observed for the reaction system in the presence of TPP.

A kinetic study of the chlorination of ketones by chloramine-T: Novel concentration dependences on the chlorinating agent and the ketones

1976 ◽  
Vol 29 (7) ◽  
pp. 1449 ◽  
Author(s):  
V Balasubramanian ◽  
V Thiagarajan
Keyword(s):  
Acetic Acid ◽  
Kinetic Study ◽  
Acidic Medium ◽  
Aqueous Acetic Acid ◽  
Acetic Acid Medium ◽  
Rate Determining Step ◽  
Low Concentrations ◽  
Concentration Dependences ◽  
Chloramine T ◽  
High Concentrations

The chlorination of acetone in aqueous acidic medium in the presence of acetic acid and dimethylformamide was subjected to kinetic study. Although the kinetics follows the traditional mechanism at high concentrations of chloramine-T (cat) and in aqueous acetic acid in the presence of sodium acetate, a term in the rate law independent of ketone concentration is reported for the first time in strongly acidic medium at low concentrations of chloramine-T. Generation of the chlorinating species is considered as the rate-determining step (Scheme 1). The mechanistic changes which occur on addition of chloride and on changing the structure of the ketone are reported. The effect of acetate on the rate in aqueous acetic acid medium is rationalized by invoking a prior equilibrium formation of enolate followed by a rate-controlling chlorination by chlorinium acetate. The retardation in rate and the consequent changes in mechanism in the case of p-bromo- and p-nitroacetophenone are accounted for by invoking a complex between the enol and the positive chlorine species similar to that in the mechanism for the chlorination of phenols.

Kinetic study of the oxidation of d-galactose by N-bromosaccharin in aqueous acetic acid

1986 ◽  
Vol 147 (1) ◽  
pp. 155-159
Author(s):  
Usha Mishra ◽  
Kusum Sharma ◽  
Vijay Kumar Sharma
Keyword(s):  
Acetic Acid ◽  
Kinetic Study ◽  
Aqueous Acetic Acid
Sign in / Sign up

Export Citation Format

Share Document