Question 2.1: Predicting the Direction of a Dipole Moment Make a three-dim...
Predicting the Direction of a Dipole Moment
Make a three-dimensional drawing of methylamine, CH_{3}NH_{2}, and show the direction of its dipole moment (μ=1.31).
Strategy
Look for any lone-pair electrons, and identify any atom with an electronegativity substantially different from that of carbon. (Usually, this means O, N, F, Cl, or Br.) Electron density will be displaced in the general direction of the electronegative atoms and the lone pairs.
Methylamine has an electronegative nitrogen atom and a lone pair of electrons. The dipole moment thus points generally from –CH_{3} toward nitrogen.
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