Éthanoyle chloride
The chloride éthanoyle is an acid chloride derived from the acetic acid (Ethanoic acid). Of CH3COCl formula, it belongs to the class of the organic compounds called halides of acyle (also halides of acid). It is irritating and easily flammable.
With room temperature, it is a transparent and colorless liquid. The éthanoyle chloride does not exist in nature, because it reacts with water to form acetic acid and hydrogen chloride. Handled with the free air, this reaction with the ambient steam causes water goutelettes and hydrogen gas a toxic white chloride smoke.
It is synthesized starting from acetic acid which one makes react with Chlorure of thionyl:
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CH3COO-H + O=SCl2 → CH3COCl + SO2 + HCl
One uses it as reagent for the Acétylation in the synthesis or the transformation of chemical compounds, for example for the Estérification (example below) and the Réaction of Friedel-Crafts.
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CH3COCl + HO-CH2-CH3 → CH3-COO-CH2-CH3 + HCl
Such acylations are often carried out in the presence of a base like the Pyridine, the Triéthylamine or the DMAP, which as a Catalyseur supports the reaction and as a neutralizes the Hydrochloric acid bases resulting.
Source
External bond
- international Chart of chemical safety 0210
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