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

Question

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

TestHub · Accepted Answer

Dipole moment = charge × distance. The C-Br bond is shorter than the very long, weak C-I bond, and Br is more electronegative than I, so the charge separation is larger in C H 3 ​ Br . So a > b.

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