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Grade: 12th pass

                        

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

4 years ago

Answers : (1)

Umakant biswal
5359 Points
							
@ 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 
 
4 years ago
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