## Dipole-Induced Dipole

JohnWalkiewicz2J
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Joined: Thu Jul 11, 2019 12:17 am
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### Dipole-Induced Dipole

Can someone explain the difference between Dipole-Induced Dipole interactions and Induced Dipole-Induced Dipole interactions and perhaps provide an example? Thanks!

Juliet Stephenson 4E
Posts: 100
Joined: Wed Sep 18, 2019 12:21 am

### Re: Dipole-Induced Dipole

Induced-dipole-induced-dipole interactions occur when two molecules become dipoles by chance. They are not naturally dipoles, but because of their environment or just random variations in the electron clouds, they become dipoles and experience bonding. An example would be two molecules of the same atom, such as two molecules of O2. Normally, since they are the same atom, they would share electrons evenly, but because of random electron dispersal, the two molecules might become polar and bond with each other.

On the other hand, dipole-induced-dipole occurs between one established dipole (H2O, for example) and another molecule which is not normally a dipole, but whose polarity is induced by some outside force. For example, if a water molecule causes an O2 molecule to become an induced dipole and they experience attraction as a result, this would be a dipole-induced-dipole interaction. Most hydrogen bonding comes from dipole-induced-dipole interactions.

Naji Sarsam 1F
Posts: 104
Joined: Sat Aug 17, 2019 12:18 am

### Re: Dipole-Induced Dipole

dipole - induced dipole interaction:
One molecule has a permanent dipole
This permanent dipole molecule is near another molecule that doesn't have a permanent dipole
However, the molecule with a permanent dipole polarizes the other molecule, inducing a dipole in it, and forming an intermolecular interaction
ex.) $H_{2}O$ has a permanent dipole polarizing $C_{4}H_{10}$ when it normally is nonpolar

induced dipole - induced dipole interaction:
Both molecules don't have permanent dipoles
But they are near each other
Random motion of electrons in both molecules may cause one of the molecules to have a very temporary dipole
This temporary dipole polarizes the nearby molecule, inducing a dipole in it as well, and forming an intermolecular interaction
ex.) random fluctuation in one $C_{4}H_{10}$ molecule causes it to have a temporary dipole, inducing a temporary dipole also in another $C_{4}H_{10}$ molecule