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can some one help me in telling why para dihydroxy benzene dipole moment is not equal to zero? While para xylene is zero.

can some one help me in telling why para dihydroxy benzene dipole moment is not equal to zero? While para xylene is zero.

Grade:12th pass

1 Answers

Umakant biswal
5349 Points
7 years ago
@ dattatray 
the dipole moment of para dimethoxybenzene is not 0 beacuse it exist in two forms , cis and trans forms . 
out of which trans have 0 dipole moment beacuse it is a symmetrical molecule , whereas in the case of cis molecule , it is not completely symmetrical , therefore it have the dipole moment of 2.25 D . 
as in solution , both forms coexist , therefore the observed dipole moment is more than 0 , but less that 2.25 D . 
u can try out this by the structure also . 
HOPE IT CLEARS YOUR DOUBT 
 

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