1.

The major product 'H' of the given reaction sequence is CH_(3)-CH_(2)-CO-CH_(3) overset(.^(Theta)CN)to G underset("Heat")overset(95%H_(2)SO_(4))toH

Answer»

`CH_(3)-CH=UNDERSET(CH_(3))underset(|)(C)-COOH`
`CH_(3)-CH=underset(CH_(3))underset(|)(C)-CN`
`CH_(3)CH_(2)-underset(CH_(3))underset(|)overset(OH)overset(|)(C)-COOH`
`CH_(3)CH=underset(CH_(3))underset(|)(C)-CONH_(2)`

Solution :`underset("Butan-2-one")(CH_(3)CH_(2)-CO-CH_(3)) overset(.^(Theta)CN)to underset("BUTANONE cyanohydrin (G)")(CH_(3)CH_(2)-underset(CH_(3))underset(|)overset(OH)overset(||)(C)-CN)underset(("Dehydration"))overset(95%H_(2)SO_(4),Delta)to underset("2-Methylbut-2-e-1-nitrile (H)")(CH_(3)CH=underset(CH_(3))underset(|)(C)-CN)`
Please note that hydrolysis of cyanides to carboxylic acids requries addition of amolecule of `H_(2)O`.95% `H_(2)SO_(4)` cannot SUPPLY `H_(2)O`, therefore, dehydration of (G) occurs to give (H).


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