Total number of deactivating groups in aromatic electrophilic substitution reaction among the following is ______. [2024]

Question

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-M groups decrease electron density on aromatic ring hence act as deactivating groups in electrophilic aromatic substitution reactions. Groups of the type $- X = Y$ and $- X \equiv Y$ act as $- M$ groups. Among given options $- {COOCH}_{3}$ and $- C \equiv N$ are $- M$ groups, thus acts as deactivating groups.

$- {NHCOCH}_{3}, - {NHCH}_{3}$ and $- {OCH}_{3}$ are +M groups hence act as activating groups for electrophilic aromatic substitution reactions. +M groups have a lone pair of electrons on first atom.

Solution

Q.
Total number of deactivating groups in aromatic electrophilic substitution reaction among the following is ______. [2024]

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Solution

Q. Total number of deactivating groups in aromatic electrophilic substitution reaction among the following is ______. [2024]

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Q.
Total number of deactivating groups in aromatic electrophilic substitution reaction among the following is ______. [2024]