JEE MAIN - Chemistry (2020 - 9th January Morning Slot - No. 19)
Which of these will produce the highest yield
in Friedel Crafts reaction?
_9th_January_Morning_Slot_en_19_1.png)
_9th_January_Morning_Slot_en_19_2.png)
_9th_January_Morning_Slot_en_19_3.png)
_9th_January_Morning_Slot_en_19_4.png)
Explanation
Friedel-Crafts reaction is an electrophilic substitution reaction. In general, the rate of these reactions is highest when benzene have some electron releasing groups, (i.e. $-\mathrm{NH}_2-\mathrm{OH}$ ) attached to the nucleus.
_9th_January_Morning_Slot_en_19_5.png)
Lewis acid (anhydrous $\mathrm{AlCl}_3$ ) used in these reactions form an adduct with the ' $-\mathrm{NH}_2$ ' or $-\mathrm{OH}$ groups and becomes ineffective.
_9th_January_Morning_Slot_en_19_6.png)
_9th_January_Morning_Slot_en_19_7.png)
withdrawing (deactivating) group, but among the given options, it is most reactive towards Friedel-Crafts reaction.
Lewis acid (anhydrous $\mathrm{AlCl}_3$ ) used in these reactions form an adduct with the ' $-\mathrm{NH}_2$ ' or $-\mathrm{OH}$ groups and becomes ineffective.
withdrawing (deactivating) group, but among the given options, it is most reactive towards Friedel-Crafts reaction.
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