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The increasing order of the rate of HCN addition to compound A – D isa. HCHOb. CH base 3COCH base 3c. phCOCH base 3d. phCOPh(a) D < C < B < Ab. C < D < b < Ac. A < B < C < Dd/ D < B < C < A
(a) NOTE : Addition of HCN to carbonyl compounds is nucleophilic addition reaction. The order of reactivity of carbonyl compounds is Aldehydes (smaller to higher) Ketones (smaller to higher), Then HCHO > CH base 3COCH base 3 > Ph.COCH base 3 > PhCOPh NOTE : The lower reactivity of Ketones is due to presence of two alkyl group which shows +1 effect. The reactivity oof Ketones decreases as the size of alkyl group increases.
(a) NOTE : Addition of HCN to carbonyl compounds is nucleophilic addition reaction. The order of reactivity of carbonyl compounds is
Aldehydes (smaller to higher) Ketones (smaller to higher), Then
HCHO > CH base 3COCH base 3 > Ph.COCH base 3 > PhCOPh
NOTE : The lower reactivity of Ketones is due to presence of two alkyl group which shows +1 effect. The reactivity oof Ketones decreases as the size of alkyl group increases.
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