Which has the more +#I# effect, -#OCH_3# or - #CH_3#?

1 Answer
Kathryn Bell
Dec 14, 2017

#-CH_3#

Explanation:

The methyl (#-CH_3#) group has the most I+ effect. Methyl groups are electron donating, and thus push electrons into the molecule.

The methoxy (#-OCH_3#) group has a I- effect. This is because oxygen has a high degree of electronegativity, and thus pulls electrons towards itself.

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