Intermolecular Forces (IMF)

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Presentation transcript:

Intermolecular Forces (IMF) Dipole/dipole Hydrogen London

INTRAmolecular vs. INTERmolecular INTRA molecular bonds are like the main type of bonding. (Ionic or Covalent) INTERmolecular bonding exist between molecules INTER is a lot WEAKER than INTRA!!

What are they? Forces that exist between molecules!!

They exist in… Mainly solids and liquids Do not exist in gases b/c their molecules are too far apart … so no attractive forces is needed!

Dipole/Dipole Forces of attraction that exist between POLAR molecules!! Have higher m.p./b.p. than nonpolar molecules! Polarity depends on the orientation of the molecule (lewis structure)!!

HYDROGEN BONDS Strongest type of IMF Occurs only b/w H and a small, highly electronegative atom such as N, O, or F Has the highest mp/bp of all 3!!

LONDON (dispersion)Forces Occurs mainly in NONPOLAR molecules! It is the WEAKEST force of all 3! Has the lowest mp/bp of all 3!! Forms temporary, instantaneous dipoles!