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Arrange o-chlorotoluene, m-chlorotoluene, p-chlorotoluene in increasing order of dipole moments.

The answer is the same order as given but I don't get why.

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  • $\begingroup$ What produces the dipole moment here in the first place? $\endgroup$ – Ivan Neretin Jan 11 at 9:15
  • $\begingroup$ @IvanNeretin I figured it had something to do with the I effect, maybe? Chlorine is electronegative and CH3 is an electron donating group, so. $\endgroup$ – stringtheorv Jan 11 at 9:18
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    $\begingroup$ Good. So essentially you have two vectors: one is directed from CH3, another towards Cl. Now look at the molecular geometry and think how these two vectors add up. $\endgroup$ – Ivan Neretin Jan 11 at 9:29
  • $\begingroup$ @IvanNeretin Got it. Thanks! $\endgroup$ – stringtheorv Jan 11 at 9:32