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Why is that dipole Moment of 1,4 Dichloro cyclohexane is non zero whreas the dipole moment of 1,4 Dichloro Benzene is zero ?

Why is that dipole Moment of 1,4 Dichloro cyclohexane is non zero whreas the dipole moment of 1,4 Dichloro Benzene is zero ?

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2 Answers

Mujahid Ahmed
42 Points
7 years ago

In cyclohexane, the carbon attached to Chlorine is Sp3 hybridised. In Benzene, the Carbon is Sp2 hybridised and hence planar. Thus, In dichloro Benzene  , both chlorines will be in same plane and thus their moment will cancel out. 

 

When Carbon is Sp3 hyridised, one Chlorine can be Above the benzene ring plane and second Chlorine can be on he plane. So their moment will not cancel out.

 

Approve if i helped :)

Ransh
15 Points
one year ago
Because cyclohexan is found in two shape/structure one chair shape and another is boat shape so it is non planer. That's why both chlorine atoms bond dipole moment doesn't cancel each other. So it's dipole moment not equal to zero. 
 

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