Abstract
The catalytic activity of the Au NPs and Au 3+ metal ions used in the oxidation of carbonyl compounds by in situ generated Na2FeO4 from an industrial point of view. In the subsequent study used the chemical reduction and green method in favor of the fabrication of 30 to70nm in the size of Au NPs. Carbonyl compounds converted to aromatic and aliphatic acids by the oxidation process. Au NPs give better yield as compared to Au 3+ ion since in case of bulk metal the size is enlarged and surface area reduce but converted to nanoparticles the surface area increased so catalytic activity augmented.
Highlights
Oxidation processes are one of the crucial steps in the industrial production of diverse compounds, much attention was being given either to switch over to the environmentally benign processes of oxidation or to minimize the use of hazardous chemicals.Oxidation by Fe (III) in the form of its various salts and complexes has established a great deal interest for most probably due its economical accessibility and a smaller amount difficulty involved in the evaluation and its ability to proceed in both H+ and OH- medium [1]
The views of Waters and co-workers were recently completely modified and the complex formation mechanism was ruled out [7] the oxidation of thiols observed by Wiberg and coworkers [8] in which there was no exchange of cyanide ligand and the oxidation habitually occurred via a charge transfer method
In the present study in which 3, 4-dimethoxy benzaldehyde was more oxidized producing a better yield of acid compared to p-methoxy benzaldehyde for which low yield was obtained because methoxy group when attached to benzene ring at o- or p-positions has a negative σ value, but when it was attached at m-position σ value becomes positive
Summary
Oxidation processes are one of the crucial steps in the industrial production of diverse compounds, much attention was being given either to switch over to the environmentally benign processes of oxidation or to minimize the use of hazardous chemicals.Oxidation by Fe (III) in the form of its various salts and complexes has established a great deal interest for most probably due its economical accessibility and a smaller amount difficulty involved in the evaluation and its ability to proceed in both H+ and OH- medium [1]. The views of Waters and co-workers were recently completely modified and the complex formation mechanism was ruled out [7] the oxidation of thiols observed by Wiberg and coworkers [8] in which there was no exchange of cyanide ligand and the oxidation habitually occurred via a charge transfer method. From these studies, it was quite obvious that oxidation occurred mainly via direct charge transfer process without changing the coordination number of iron. Oxidation of triethylamine in alkaline medium [14] and Os (VIII) catalyzed the oxidation of cyclic amines have been reported [15]
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