1.

Give plausible explanation for each of the following: Cyclohexanone forms cyanohydrin in good yield but 2,2,6-trimethyl cyclohexanone does not. These are two −NH2 groups in semicarbazide. However, only one is involved in the formation of semicarbazones. During the preparation of esters from a carboxylic acid and an alcohol in the presence of an acid catalyst, the water or the ester should be removed as soon as it is formed.

Answer»

Give plausible explanation for each of the following:
Cyclohexanone forms cyanohydrin in good yield but 2,2,6-trimethyl cyclohexanone does not.

These are two NH2 groups in semicarbazide. However, only one is involved in the formation of semicarbazones.

During the preparation of esters from a carboxylic acid and an alcohol in the presence of an acid catalyst, the water or the ester should be removed as soon as it is formed.



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