Acetophenone or Acetyl Benzene, Aldehydes and Ketones Assignment Help

Assignment Help: >> Aromatic Carbonyl Compounds >> Acetophenone or Acetyl Benzene, Aldehydes and Ketones

Acetophenone, C6H5COCH3, Acetyl Benzene

         Method of preparation

         (i) Friedel-Craft's reaction : Acetyl chloride reacts with benzene in presence of anhydrous aluminium chloride to form acetophenone.

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         (ii) By distillation of a combination of calcium benzoate and calcium acetate.

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         (iii) By methylation of benzaldehyde reacted with diazomethane.

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         (iv) By reacting benzoyl chloride with dimethyl cadmium.

         1955_preparation of acetophenone3.png

         (v) By Grignard reagent

              (a) 437_preparation of acetophenone4.png

               (b) 2309_preparation of acetophenone5.png

         (vi) Commercial preparation : Ethylbenzene is oxidised with air at 126o C under pressure in presence of a catalyst manganese acetate.

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