Why is SF4 Polar?

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

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Angeline 3E
Posts: 50
Joined: Wed Sep 18, 2019 12:20 am

Why is SF4 Polar?

Postby Angeline 3E » Sun Nov 17, 2019 10:45 pm

It has a seesaw shape but how does the shape affect its polarity? Thanks !

Leslie Almaraz 4G
Posts: 99
Joined: Fri Aug 02, 2019 12:16 am

Re: Why is SF4 Polar?

Postby Leslie Almaraz 4G » Sun Nov 17, 2019 10:50 pm

I think there is a slight charge on each side that makes it polar.

Althea Zhao 1B
Posts: 101
Joined: Mon Jun 17, 2019 7:24 am

Re: Why is SF4 Polar?

Postby Althea Zhao 1B » Sun Nov 17, 2019 10:55 pm

The shape of the molecule plays a role in determining its polarity. Since the seesaw shape is not symmetrical, the S-F bond energies do not cancel and there is polarity.

Megan Vu 1J
Posts: 101
Joined: Thu Jul 25, 2019 12:15 am

Re: Why is SF4 Polar?

Postby Megan Vu 1J » Mon Nov 18, 2019 11:57 am

SF4 is polar because being polar means that it has an unequal distribution of electrons in it's structure. Because of the seesaw shape, it indicates that there are 4 bonded pairs as well as 1 lone pair of electrons. Because of the 1 lone pair of electrons around the central atom, it is characterized as polar since it is more electronegative with the lone pair of electrons, and it shows how unsymmetrical it is.

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

Re: Why is SF4 Polar?

Postby Kelsey Ash 1D » Mon Nov 18, 2019 12:02 pm

Since there is a seesaw shape the shape of the molecule is not symmetrical so the energies don't cancel making it polar

Paul Hage 2G
Posts: 105
Joined: Thu Jul 25, 2019 12:17 am

Re: Why is SF4 Polar?

Postby Paul Hage 2G » Mon Nov 18, 2019 12:57 pm

If the polar bonds in the following shapes are identical, with the same atoms connected to the central atom, then the molecule will be non-polar: linear, trigonal planar, tetrahedral, trigonal bipyramidal, and octahedral. This is because the atoms will be arranged symmetrically around the central atom due to the fact that there will be no lone pairs present on the central atom. Therefore, the dipoles will cancel.

Robert Tran 1B
Posts: 118
Joined: Thu Jul 11, 2019 12:15 am

Re: Why is SF4 Polar?

Postby Robert Tran 1B » Mon Nov 18, 2019 1:00 pm

Since the S--F bond has a dipole moment and the seesaw shape does not allow the dipole moments to cancel out, the molecule is polar. If all the bonds were arranged symmetrically, in a tetrahedral shape, for example, the molecule would not be polar.

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