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which one has highest dipole moment?1)nitro benzene2)para nitro aniline3)ortho nitro aniline4)meta nitro aniline

alagan , 9 Years ago
Grade 12
anser 2 Answers
Pankaj

Last Activity: 9 Years ago

Nitro group is electron withdrawing while amine group is electron donating in nature.
The dipole moment of both nitro and amine group are in the same direction so they add up which increases the dipole moment.

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The effect of nitro group is maximum when it is present at p- position , so p-nitroaniline has highest dipole moment.

subhadeep

Last Activity: 3 Years ago

Due to +R effect of amine and -R effect of nitro group, dipole moment is maximum when at para position to each other. This is also called push-pull effect. 

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