Compare the dipole moments of vinyl bromide and ethyl bromide. Is the dipole moment of (a) greater than, less than or equal to that of (b) ?
(a)
(b)

Question

Compare the dipole moments of vinyl bromide and ethyl bromide. Is the dipole moment of (a) greater than, less than or equal to that of (b) ? (a) (b)

TestHub · Accepted Answer

In vinyl bromide the -I effect of Br is opposed by its +M effect (lone pair into the C=C bond). In ethyl bromide the -I effect of Br is reinforced by the +I effect of the C H 3 ​ group. So a < b.

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