Compare the dipole moments of p-chlorophenol and p-fluorophenol. Is the dipole moment of (a) greater than, less than or equal to that of (b) ?
(a)
(b)

Question

Compare the dipole moments of p-chlorophenol and p-fluorophenol. Is the dipole moment of (a) greater than, less than or equal to that of (b) ? (a) (b)

TestHub · Accepted Answer

The C-Cl bond is longer, so the dipole is larger, and the +M effect of F opposes the OH group's effect more than that of Cl does. So a > b.

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