Identify electron-donating groups in resonance among the following:(A) $- C O {N H}_{2}$ (B) $- {N O}_{2}$
(C) $- O C O {C H}_{3}$ (D) $- C O {C H}_{3}$ (E) $- C H O$ (F) $- N H C O {C H}_{3}$

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Solution

Substituents with lone pairs (e.g. $- O C H_{3}$ , $- N H_{2}$ ) on the atoms adjacent to the $π$ -system are electron donating groups (EDG) in resonance systems.

And, substituents with $π$ -bonds to electronegative atoms (e.g. $- C = O$ , $- N O_{2}$ ) adjacent to the $π$ -system are electron withdrawing groups (EWG) in a resonating structure.

Therefore among the following groups electron-donating groups are:
(C) $- O C O C H_{3}$ , and (F) $- N H C O C H_{3}$

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Similar questions

Among follwing Electron donating groups are:

a) $- C l$

b) $- C O -$

c) $- N O_{2}$

d) $- O H$

e) $- N H_{2}$

- 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}

- C O O H

- {C O N H C H}_{3}

- C O C l

- C N

- O - C H = {C H}_{2}

- {N O}_{2}

- {N H}_{2}

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