Induced dipoles

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Anushi Patel 1J
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Joined: Fri Sep 28, 2018 12:19 am
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Induced dipoles

Postby Anushi Patel 1J » Thu Nov 08, 2018 4:55 pm

Can someone explain to me exactly how a molecule with a temporary dipole induces dipoles in other molecules it interacts with?

monikac4k
Posts: 56
Joined: Fri Sep 28, 2018 12:25 am

Re: Induced dipoles

Postby monikac4k » Thu Nov 08, 2018 5:02 pm

If a molecule is already experiencing a dipole moment, where one area is slightly negative and another is slightly positive, then these minor charges will cause a shift in the electron cloud of nearby molecules. If a molecule (let's call it A) is near a positively charged region of another molecule (B), the electrons of the molecule A will shift towards the positive dipole moment of the nearby molecule B. This results in changes of the electron cloud of molecule A, creating a new dipole moment with the negative end of A towards the positive end of B.

Mona Lee 4L
Posts: 60
Joined: Fri Sep 28, 2018 12:16 am

Re: Induced dipoles

Postby Mona Lee 4L » Fri Nov 09, 2018 4:28 pm

For every molecule, there are a lot of negatively-charged electrons held around a positively-charged nucleus. If a small shift in this electron cloud occurs, it will create a small dipole whereby one part is more positive and one more negative. This small dipole will then induce a change in nearby molecules. The larger the electron cloud, the more easily polarizable the molecule will be because of the increased electron-electron repulsion.


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