The activating effect of $- N H C O C H_{3}$ group is ______ as compared to $- N H_{2}$ group.

less

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same

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very high

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Solution

The correct option is A less
The $- N H C O C H_{3}$ group forms two resonance structures, where the lone pair of nitrogen interacts with the CO group. This makes the lone electron pair on N less available for donation to benzene ring.

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STATEMENT-1 : Acetanilide is more reactive than aniline towards electrophilic substitution reactions.

STATEMENT-2 : The activating effect of $N H C O C H_{3}$ is less than that of amino group.

- N O_{2}

- N H_{2}

- O^{-}

- N H_{2}

- O H

- N H C O C H_{3}

- C O O H, - C N, - N H_{2} - C O C H_{3}, - N H C O C H_{3}, - O H, - C H O, - S O_{3} H, - C l, - N O_{2}

- N H C O C H_{3} I - O - O | | C I I - C H_{3} - + N R_{3} I I I - N H_{2} I V

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