London Dispersion Forces
London dispersion forces are intermolecular forces
resulting from the attraction of coordinated temporary
dipole moments induced adjacent molecules. It is the
principle attractive force in nonpolar molecules. See page
64 of your text book for examples of this phenomenon.
The effects of London forces can be observed when
examining the boiling points of simple hydrocarbons. The
more highly branched isomeric alkanes are, the lower the
boiling point because of decreased surface area.