The reactions of cerium (IV) ammonium nitrate and cobalt (III) acetate with 1,2-diphenylethanes in acetic acid. Evidence against the involvement of radical cations in the side-chain oxidation of alkylbenzenes by Co(OAc)3

1984 ◽  
pp. 445 ◽  
Author(s):  
Enrico Baciocchi ◽  
Renzo Ruzziconi
Keyword(s):  
Acetic Acid ◽  
Ammonium Nitrate ◽  
Radical Cations ◽  
Side Chain ◽  
Chain Oxidation ◽  
Cerium Iv Ammonium Nitrate

ChemInform Abstract: Product and Kinetic Study of the Oxidation of Thioethers by Cerium(IV) Ammonium Nitrate in Acetic Acid

ChemInform ◽  
1990 ◽  
Vol 21 (22) ◽  
Author(s):  
E. BACIOCCHI ◽  
D. INTINI ◽  
A. PIERMATTEI ◽  
C. ROL ◽  
R. RUZZICONI
Keyword(s):  
Acetic Acid ◽  
Kinetic Study ◽  
Ammonium Nitrate ◽  
Cerium Iv Ammonium Nitrate

scholarly journals The oxidation of 4-bromacetophenone by ozone in acetic acid

2021 ◽  
pp. 37-42
Author(s):  
A. Galstyan ◽  
A. Bushuyev ◽  
A. Krasilnikova ◽  
M. Zhurba
Keyword(s):  
Acetic Acid ◽  
Acetic Acid Solution ◽  
Decisive Role ◽  
Reduced Form ◽  
Main Reaction ◽  
Side Chain ◽  
Reaction Products ◽  
Third Order ◽  
Chain Oxidation ◽  
High Concentrations

The kinetics and mechanism of oxidation of 4-bromoacetophenone by ozone in acetic acid solution have been studied. It was shown that 77% of the starting material is oxidized by the benzene ring; 8% of 4-bromobenzoic acid and small amounts of carbon (IV) oxide were identified among the side chain ozonation products. The main reaction products are aliphatic peroxide compounds, which have in their structure one hydroperoxide group. Manganese (II) acetate was shown to be the most effective catalyst for the side chain reaction of 4-bromoacetophenone in acetic acid. High selectivity for the side chain is achieved only at sufficiently high concentrations of catalyst ([Mn(OAc)2]0:[ArH]0=1:4). The main product of the catalytic oxidation of 4-bromoacetophenone is 4-bromobenzoic acid with a yield of 82.5%. The found dependences of the rate of oxidation of 4-bromoacetophenone by ozone on the concentration of reactants are described by the kinetic equation of the third order, the reaction rate has the first order with respect to each reagent. It was found that the decisive role in the selective oxidation of 4-bromoacetophenone is played by two-stage oxidation, in which ozone predominantly reacts with the reduced form of manganese, and the introduction of the substrate into side chain oxidation is carried out by the reaction with the oxidized form of metal. According to the research results, the mechanism of catalytic ozonation of 4-bromoacetophenone in acetic acid has been proposed, which involves ion-radical non-chain oxidation of the substrate.

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