Introduction to Intermolecular Forces
Chemistry: IB Diploma Higher Level, topic 2.8.1
Types of Intermolecular Forces
Intermolecular forces operate between all types of molecules and are much weaker than intramolecular forces. We shall look at three types of intermolecular forces:
London dispersion forces
- These are the weakest intermolecular interactions we shall consider.
Permanent dipole-dipole interactions
- These are stronger than London dispersion forces but weaker than hydrogen bonds.
Ion-dipole interactions
- These are present between ions and polar molecules.
- They tend to be stronger than dipole-dipole interactions.
Hydrogen bonds
- These are the strongest form of intermolecular forces we shall consider.
- They are still much weaker than intramolecular forces (e.g. covalent bonds).
Test yourself on Introduction to Intermolecular Forces
Intermolecular Forces
Which of the following is NOT a type of intermolecular force?
Which of the following forces and bonds is strongest?