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Question
The rate of electrophilic addition is fastest in which of the following:
The rate of electrophilic addition is fastest in which of the following:
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Solution
The correct option is A
OH has higher +R effect compare to OCH3 because in OCH3, CH3 cause steric repulsion with lone pair of electron and it affect its electron donating nature.
NO2 shows −R effect. Thus, it decrease the electron density of double bond.
Higher +R effect of -OH increases the electron density on the double bonded carbons making it as a most favourable electron donating centres for electrophile and hence, increases the rate of electrophilic addition.
OH has higher +R effect compare to OCH3 because in OCH3, CH3 cause steric repulsion with lone pair of electron and it affect its electron donating nature.
NO2 shows −R effect. Thus, it decrease the electron density of double bond.
Higher +R effect of -OH increases the electron density on the double bonded carbons making it as a most favourable electron donating centres for electrophile and hence, increases the rate of electrophilic addition.
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