Intermolecular Interactions

Intermolecular interacons mostly characterized by

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Unformatted text preview: ermolecular interac+ons THE CASE AGAINST This is SCIENCE not journalism. We do not need to quote from Dr. Crazy A. S. A. Loon of Print Your Degree on the Internet! University Science is biased towards the truth. Intermolecular Interac+ons TYPES Bonds, Bonds(?), and Bonds? •  Chemical bonds –  Between 2 or more atoms •  Shared e ­ = covalent •  Transferred e ­ = ionic (laice) •  Da+ve bonds (shared, but both e ­ from same atom) •  Intermolecular bonds and “bonds” –  Between two or more atoms/molecules •  A range of possibili+es •  Individually weak, but there can be lots of them Da+ve derived from la+n: ~dare~ to give. Intermolecular Interac+ons •  Mostly characterized by diploar interac+ons •  Called “the London Forces” or “London Dispersion Forces” or “Dispersion Forces” •  There are ~four. AKA induced dipole –  THEE dispersion force (instantaneous dipole) –  Dipole ­X (X=dipole, inst. Dipole, or ion) –  Hydrogen bonding Instantaneous dipoles •  The electrons concentrate on one side of an atom/molecule –  Par+al nega+ve one side, par+al posi+ve the other •  ALL atoms/molecules do this •  Can interact with another instant dipole. (...
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