Seesaw molecular shape

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

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Jesus Rodriguez 1J
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Joined: Sat Jul 22, 2017 3:00 am

Seesaw molecular shape

Postby Jesus Rodriguez 1J » Sun Nov 26, 2017 6:11 pm

I was wondering if anyone could explain how we know if a compound has the seesaw molecular shape

Tatiana Hage 2E
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Re: Seesaw molecular shape

Postby Tatiana Hage 2E » Sun Nov 26, 2017 6:14 pm

The seesaw shape occurs when a molecule has a central atom bonded to 4 other atoms and 1 lone pair.

Joshua Hughes 1L
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Re: Seesaw molecular shape

Postby Joshua Hughes 1L » Sun Nov 26, 2017 6:20 pm

The easiest way is to look at how many lone pairs the central atom will have.
AX3E2 is T-shaped
AX4E is Seesaw shaped. There are 5 regions of electron density, meaning it has is a trigonal bipyramidal shape in regions of electron density, but two of those 5 are lone pairs so it becomes a molecular shape that kind of is like a seesaw.
Look at the chart on this webpage for reference ... -is-linear

Michelle Lu 1F
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Re: Seesaw molecular shape

Postby Michelle Lu 1F » Sun Nov 26, 2017 8:12 pm

If the central atom of a molecule has 4 bonded electron pairs and 1 lone pair, this will cause the molecule to have the seesaw shape.

Rithik Kumar 3E
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Re: Seesaw molecular shape

Postby Rithik Kumar 3E » Mon Nov 27, 2017 5:28 pm

A seesaw molecular shape is achieved if a molecule has 4 electron bonding regions (bonds) about the central atom and one lone pair. This is because the original trigonal bipyramidal shape is changed as the bond angles within the non-axial regions are affected by the presence of a lone pair.

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