What intermolecular forces are present in #CH_3F#?
Dipole-Dipole and London (Dispersion) Forces.
If we look at the molecule, there are no metal atoms to form ionic bonds. Furthermore, the molecule lacks hydrogen atoms bonded to nitrogen, oxygen, or fluorine; ruling out hydrogen bonding. Finally, there is a dipole formed by the difference in electronegativity between the carbon and fluorine atoms. This means the fluoromethane molecule will have a strong dipole-dipole force. As all molecules have the London (dispersion) force as caused by the electrons and positive nuclei, it too is present.