107intermolecular

107intermolecular - Intermolecular Forces Glenn V. Lo...

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    Intermolecular Forces Glenn V. Lo Department of Physical Sciences Nicholls State University
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    Molecular Polarity Polar Molecule Has at least one polar bond If >1 polar bonds: they must not be  symmetrically oriented Example: CO 2  is nonpolar H 2 O is polar CCl 4  is nonpolar
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    Intermolecular Forces Van der Waals forces Dipole-dipole interaction Dipole-induced dipole interaction London dispersion forces (predominant) Hydrogen bonding interaction Significantly stronger than London  dispersion forces  for small molecules
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    Van der Waals forces Dipole-dipole interaction + end of polar molecule tends to be  attracted to – end of another polar  molecule Example: HCl ----- HCl Dipole-induced dipole interaction + or – end of a polar molecule could induce  a temporary polarity in an otherwise  nonpolar molecule
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    Van der Waals forces
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This note was uploaded on 06/11/2009 for the course CHEM 105 taught by Professor Wessel during the Spring '08 term at Nicholls State.

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107intermolecular - Intermolecular Forces Glenn V. Lo...

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