Trends
(Dipole-Dipole)
- Electronegative Difference. Polarity is amplified when electronegativity difference is large
- Bond Length (primarily atomic radii of the bonding partners)
- Increasing bond length decreases dipole
(H-Bonding)
The more electronegative the atom attracted to H, the stronger the bond
3rd (London Dispersion)
- Molecules with lesser electronegativity and larger radii have higher polarizability.
- Higher polarizability = stronger attraction.