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Decarboxylation....

Decarboxylation.

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The process of removal of a molecule of `CO_(2)` from a carboxylic acid is called decarboxylation. It is usually carried out by heating a carboxylic acid or its sodium salt with soda-lime `underset("3 : 1")((NaOH+CaO))` at 630 K. For example,
`underset("(Sod. acetate)")overset("Sod. ethanoate")(CH_(3)COONa)+NaOHunderset(630K)overset(CaO)(to)underset("Methane")(CH_(4))+Na_(2)CO_(3)`

In case, a carboxylic acid carries an electron withdrawing group such as Co, COOH, `NO_(2)` etc. at `beta`-position w.r.t. the carboxylic group, decarboxylation can be readily achieved just by heating. for example,
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