Intermolecular Attractions

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Intermolecular Attractions

• Attractions Between Molecules
• van der Waals forces
• Two types dispersion forces and dipole
  interactions
• Dispersion forces
• Weakest of all molecular interactions
• Caused by movement of electrons
• Occurs in the BrINClHOFs

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Intermolecular Attractions Attractions Between
Molecules

• 2nd van der Waals force
• Dipole interactions
• Occurs when polar molecules are attracted to one
  another
• Partial charge (?) of one polar molecule is
  attracted to the opposite partial charge (?-) of
  another molecule

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Chapter 16 Covalent Bonding-- Polar Bonds and
Molecules --

• Attractions Between Molecules
• Hydrogen bonding
• Hydrogen covalently bonded to a very
  electronegative atom is also weakly bonded to an
  unshared electron pair of another electronegative
  atom
• Example water

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