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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 BrINClHOF’s.
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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 BrINClHOF’s
Intermolecular AttractionsAttractions 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
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