Dipole Moment

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Tracy Tolentino_2E
Posts: 140
Joined: Sat Sep 07, 2019 12:17 am

Dipole Moment

Postby Tracy Tolentino_2E » Sun Nov 10, 2019 11:06 pm

How do we know if a molecule has a dipole moment? And why does the arrow have to point to the lowercase delta positive?

Alex Tchekanov Dis 2k
Posts: 118
Joined: Sat Aug 24, 2019 12:16 am

Re: Dipole Moment

Postby Alex Tchekanov Dis 2k » Sun Nov 10, 2019 11:08 pm

You know a molecule has a dipole moment when there is an unequal sharing of the electron. The dipole moment is larger when the difference in electronegativity is greater. The reason why the arrow points towards the partially charged atom is because that is the direction that the electron is being pulled towards.

Eesha Sohail 1D
Posts: 100
Joined: Sat Aug 17, 2019 12:16 am

Re: Dipole Moment

Postby Eesha Sohail 1D » Sun Nov 10, 2019 11:13 pm

Aren't van der Waals interactions still technically dipoles, just not permanent ones? I've seen them referred to as instantaneous dipoles. Also just to clarify, would the C=O bond be able to produce a dipole moment?

Trent Yamamoto 2J
Posts: 111
Joined: Sat Aug 17, 2019 12:18 am

Re: Dipole Moment

Postby Trent Yamamoto 2J » Mon Nov 11, 2019 10:43 am

I believe you can also recognize a dipole moment when there is a polar covalent bond, which by definition is when electrons in a covalent bond are not equally shared.

Kelsey Ash 1D
Posts: 50
Joined: Wed Sep 18, 2019 12:16 am

Re: Dipole Moment

Postby Kelsey Ash 1D » Mon Nov 11, 2019 3:43 pm

You know there is a dipole moment when there is an unequal sharing of electrons among atoms. The arrow always points in the direction in which the electron os being pulled.

Ashley Fang 2G
Posts: 102
Joined: Fri Aug 30, 2019 12:17 am

Re: Dipole Moment

Postby Ashley Fang 2G » Mon Nov 11, 2019 5:48 pm

To add to that, the arrow always points to the lowercase delta negative sign, and a line strikes through the arrow at the lowercase delta positive sign (making a cross or a "+" to help you remember it)
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EricZhao3G
Posts: 51
Joined: Tue Oct 08, 2019 12:16 am

Re: Dipole Moment

Postby EricZhao3G » Tue Nov 12, 2019 3:58 pm

A molecule has a dipole moment if there is an unequal sharing of electrons. The arrow points towards the delta negative not delta positive since that is where the electron is being pulled towards.


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