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Grade 12th passOrganic Chemistry

why dipole moment of 2,4,6-trimethylnotrobenzene is closer to nitromethane than that of nitrobenzene

Profile image of aqsa
6 Years agoGrade 12th pass
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2 Answers

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Vikas TU

6 Years ago
Nitrobenzene has more dipole moment than nitro methane because in nitrobenzene there is greater charge separation due to the resonance.
 As we know, dipole moment is directly proportional to the charge and distance
 . D = d x e 
where  d = distance of separation
 and e = charge. In nitro methane
 there is no such kind of charge separation. Therefore, it has less dipole moment.