13
Question
Among the compounds:
The order of decreasing reactivity towards electrophilic substitution is :
Among the compounds:
The order of decreasing reactivity towards electrophilic substitution is :
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Solution
The correct option is B III >I >II >IV
The decreasing order of the reactivity towards electrophilic aromatic substitution reaction is III>I>II>IV.
When an electron withdrawing trifluoromethyl group is present, it reduces the electron density of the benzene ring and deactivates it towards electrophilic aromatic substitution reaction. When electron releasing groups such as methyl or methoxy groups are present, they increase the electron density on the ring and activate it towards electrophilic aromatic substitution reaction.
The decreasing order of the reactivity towards electrophilic aromatic substitution reaction is III>I>II>IV.
When an electron withdrawing trifluoromethyl group is present, it reduces the electron density of the benzene ring and deactivates it towards electrophilic aromatic substitution reaction. When electron releasing groups such as methyl or methoxy groups are present, they increase the electron density on the ring and activate it towards electrophilic aromatic substitution reaction.
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