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Why is SF4 Polar?

Posted: Sun Nov 17, 2019 10:45 pm
by Angeline 3E
It has a seesaw shape but how does the shape affect its polarity? Thanks !

Re: Why is SF4 Polar?

Posted: Sun Nov 17, 2019 10:50 pm
by Leslie Almaraz 4G
I think there is a slight charge on each side that makes it polar.

Re: Why is SF4 Polar?

Posted: Sun Nov 17, 2019 10:55 pm
by Althea Zhao 1B
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.

Re: Why is SF4 Polar?

Posted: Mon Nov 18, 2019 11:57 am
by Megan Vu 1J
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.

Re: Why is SF4 Polar?

Posted: Mon Nov 18, 2019 12:02 pm
by Kelsey Ash 1D
Since there is a seesaw shape the shape of the molecule is not symmetrical so the energies don't cancel making it polar

Re: Why is SF4 Polar?

Posted: Mon Nov 18, 2019 12:57 pm
by Paul Hage 2G
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.

Re: Why is SF4 Polar?

Posted: Mon Nov 18, 2019 1:00 pm
by Robert Tran 1B
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.