XA2E2

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EMurphy_2L
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Joined: Sat Sep 07, 2019 12:16 am

XA2E2

Postby EMurphy_2L » Wed Nov 20, 2019 5:22 pm

for VSEPR formula XA2E2, is it called bent?? is this just a tetrahedral shape with two missing?

Brian_Ho_2B
Posts: 221
Joined: Fri Aug 09, 2019 12:16 am

Re: XA2E2

Postby Brian_Ho_2B » Wed Nov 20, 2019 5:28 pm

AX2E2 is bent because the electron regions arrange themselves in a tetrahedral manner, but since there are only two actual bonds on the central atom, the geometry is bent. The angle is less than 109.5 degrees, however, because of the repulsion of the two lone pairs.

KnarGeghamyan1B
Posts: 102
Joined: Fri Aug 09, 2019 12:15 am

Re: XA2E2

Postby KnarGeghamyan1B » Wed Nov 20, 2019 5:32 pm

The molecule is called bent (v shaped) and looks very similar to a tetrahedral except for one of the electron lone pairs takes the place of where the third bonded molecule would have gone, which is why the angles are slightly less than 109.5.

EMurphy_2L
Posts: 128
Joined: Sat Sep 07, 2019 12:16 am

Re: XA2E2

Postby EMurphy_2L » Wed Nov 20, 2019 6:45 pm

is AX3E also called bent

Tyler Angtuaco 1G
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Joined: Wed Sep 11, 2019 12:16 am

Re: XA2E2

Postby Tyler Angtuaco 1G » Wed Nov 20, 2019 7:40 pm

Yes, it would be bent because electrons would position themselves on the same side of the atom rather than 180 degrees apart. This is due to the fact that lone pair - lone pair repulsion is strongest.

Tyler Angtuaco 1G
Posts: 130
Joined: Wed Sep 11, 2019 12:16 am

Re: XA2E2

Postby Tyler Angtuaco 1G » Wed Nov 20, 2019 7:43 pm

EMurphy_1L wrote:is AX3E also called bent

AX3E would be trigonal pyramidal because there is a tetrahedral electron arrangement (bond angles of 109.5 degrees), but the lone pair reduces the bond angle because of repulsion.

If you meant AX2E, yes, AX2E would be bent too. This is because there would be a trigonal planar electron arrangement, but the lone pair is not considered when naming the molecular shape.

Joanne Lee 1J
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Joined: Thu Jul 25, 2019 12:15 am

Re: XA2E2

Postby Joanne Lee 1J » Thu Nov 21, 2019 2:23 pm

For the VSEPR formula XA2E2 it would be called bent.

Joelle 3L
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Joined: Sat Jul 20, 2019 12:16 am

Re: XA2E2

Postby Joelle 3L » Thu Nov 21, 2019 4:27 pm

Yes, it would be called bent since there are actually two bonds. This is because lone pairs do influence molecular shape but only atom positions are used to name the shape.

Anvi Brahmbhatt 4A
Posts: 51
Joined: Wed Sep 18, 2019 12:21 am

Re: XA2E2

Postby Anvi Brahmbhatt 4A » Thu Nov 21, 2019 4:38 pm

AX2E2 is bent because the lone pairs do affect the positions of the atoms and thus the molecular shape.

Janet Nguy 2C
Posts: 115
Joined: Sat Aug 24, 2019 12:17 am

Re: XA2E2

Postby Janet Nguy 2C » Thu Nov 21, 2019 5:58 pm

Because the tetrahedral shape is unique, you can remove any 2 atoms and replace them with lone pairs and you would end up with a bent shape.


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