Net Dipole Moment

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Maria Poblete 2C
Posts: 102
Joined: Wed Sep 18, 2019 12:15 am

Net Dipole Moment

Postby Maria Poblete 2C » Mon Nov 18, 2019 9:26 pm

Does BrF6 have a net dipole moment? I know that F is more electronegative, so the dipole moment travels from the central Br to each F atom. When I draw all of these vectors out, I think they sum up to be 0. Is this correct? Is there another way to look at this?

Jessica Castellanos
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Joined: Sat Aug 24, 2019 12:17 am
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Re: Net Dipole Moment

Postby Jessica Castellanos » Mon Nov 18, 2019 9:29 pm

The net dipole moment is 0 since the dipoles cancel out in an octahedral shape.

Pablo 1K
Posts: 118
Joined: Sat Feb 02, 2019 12:15 am

Re: Net Dipole Moment

Postby Pablo 1K » Mon Nov 18, 2019 9:30 pm

Yes, since as mentioned above, in an octahedral shape, it is most stable and net dipole moments is 0.

Abby Soriano 1J
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Joined: Sat Aug 24, 2019 12:16 am

Re: Net Dipole Moment

Postby Abby Soriano 1J » Mon Nov 18, 2019 10:27 pm

The dipole moments cancel each other out since they are all, essentially, the same (the only bond is a Br-F bond). If they were not all the same element (not all F or any other atom), then the dipole moments would not cancel, resulting in a net dipole moment.

Esha Chawla 2E
Posts: 108
Joined: Thu Jul 25, 2019 12:17 am

Re: Net Dipole Moment

Postby Esha Chawla 2E » Mon Nov 18, 2019 10:30 pm

Maria Poblete 1D wrote:Does BrF6 have a net dipole moment? I know that F is more electronegative, so the dipole moment travels from the central Br to each F atom. When I draw all of these vectors out, I think they sum up to be 0. Is this correct? Is there another way to look at this?


One way to see that the net dipole moment is 0 is to draw out the VSEPR structure. Then, draw electronegativity arrows from the Br atom to each F atom. Using this, you'll be able to see how each electronegativity arrow cancels out with another. Thus, you can confirm that the net dipole moment is 0.


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