Based on their boiling points, which of the following compounds has the largest dipole-dipole interaction?
A)propane (231 K)
B)dimethyl ether (248 K)
C)acetonitrile (355 K)
D)methyl chloride (249 K)
E)butane (135 K)

Question

Quizplus · Accepted Answer

The dipole-dipole interaction is directly related to the polarity of the molecule. The larger the dipole moment, the stronger the interaction. Among the given compounds, acetonitrile has the largest dipole moment due to the presence of an electronegative nitrogen atom and a polar carbon-nitrogen triple bond. This makes it more polar than the other compounds and hence has the largest dipole-dipole interaction.

Based on Their Boiling Points, Which of the Following Compounds