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

1 Answer
May 22, 2016


dipole-dipole interaction


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:

enter image source here

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:
enter image source here
Image source: https://upload.wikimedia.org