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Q.
Which of the following alternative is correct for the treatment of ketones with ethylene glycol in the presence of dry $HCl$ ?
Aldehydes Ketones and Carboxylic Acids
Solution:
Ketones react with ethylene glycol in the presence of dry $HCl $ to form cyclic products known as ethylene glycol ketals.
In the above reaction dry $HCl$ protonates the oxygen of the carbonyl compounds and therefore, increases the electrophilicity of the carbonyl carbon facilitating the nucleophilic attack of ethylene glycol.
