What are weak chemical bonds that form between polar molecules called?

1 Answer
Dr. Hayek
May 22, 2016

dipole-dipole interaction

Explanation:

polar molecules are characterized by their net dipole moment resulting from the pull of electron density by an electronegative element from a less electronegative one.

For example, in a carbonyl group #C=O# of acetone, the oxygen pulls the electron density toward it resulting in a partial negative charge (#delta-#) on oxygen and a partial positive charge (#delta+#) on carbon:

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the attraction between the #delta-# on oxygen from one molecule and the #delta+# on carbon from another molecule will result in a dipole-dipole interaction between the two molecules:
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Image source: https://upload.wikimedia.org

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