Intermolecular Forces

(Polar molecules, Non-polar molecules, etc.)

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Wendy 1E
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Intermolecular Forces

Postby Wendy 1E » Wed Nov 13, 2019 9:35 am

If given a molecule, how can you determine whether it has dipole-dipole interactions, dipole-induced dipole interactions, or induced dipole-induced dipole interactions?

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Re: Intermolecular Forces

Postby Chem_Mod » Wed Nov 13, 2019 10:30 am

Draw the lewis structure first, if you can identify a dipole (difference in electronegativity between two atoms), it will have dipole dipole interactions and dipole - induced dipole, especially if another molecule that has no dipole is present (induced). If it does not have those properties, then the only force it can have is induced dipole - induced dipole.

Cynthia Gong 1L
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Re: Intermolecular Forces

Postby Cynthia Gong 1L » Wed Nov 13, 2019 11:31 am

To determine the type of intermolecular force present, you look at the the difference in electronegativity between the atoms in a molecule. If the there is a great difference in electronegativity, a dipole-dipole interaction will occur with other polarized molecules or a dipole-induced dipole interaction with another non-polar molecule. If there is not a big difference in electronegativity, then the interaction will be induced-dipole induced-dipole

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