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

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Postby 204929947 » Mon Jun 11, 2018 1:37 am

I looked for the bond angles of the T-Shape but online some websites say slightly less than 90 degrees but others say 90 degrees and 120 degrees... someone help please

Chris Qiu 1H
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Re: T-Shape

Postby Chris Qiu 1H » Mon Jun 11, 2018 1:47 am

There are three angles you look at when you view t shaped. Without taking into account lone pair repulsion you would have two 90 degree angles and one 180 degree. However the lone pairs will push the two atoms making the top of the T closed towards the third atom. This would mean that the 90 degree angles would be slightly less and the 180 degree will be slightly more. Hope that makes sense.

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Re: T-Shape

Postby nelquosey » Mon Jun 11, 2018 6:58 pm

You need to consider that a T shape has different bond angles within it, they are not all identical.

Ismail 1F
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Re: T-Shape

Postby Ismail 1F » Mon Jun 11, 2018 7:01 pm

T-shape is made up of two lone pairs and three bonded elements to the central atom. Thus the arrangement would have to be similar to a trigonal pyramidal with two lone pairs, so the angles would be 90 degrees apart for the T-shape with two lone pairs attached.

Tina Wen 1G
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Re: T-Shape

Postby Tina Wen 1G » Mon Jun 11, 2018 7:55 pm

Generally for T-shape if you disregard the influence of the lone pairs stating that the angles are 90 degrees and 180 degrees is fine. But with real life experiments there might be slight differences according different T-shaped structures.

Andrea Raymundo 1B
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Re: T-Shape

Postby Andrea Raymundo 1B » Thu Jun 14, 2018 2:07 pm

one has to realize that there are 5 regions of electron density which would usually be 120 and 90 degrees but since two of these are lon pairs it makes the angles smaller because the lone pairs push the bonds away.

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Re: T-Shape

Postby LeannaPhan14BDis1D » Fri Nov 09, 2018 9:21 pm

When we put the angles being 90 and 120 it is mainly a ballpark answer unless you calculated it being on the dot. it is around 90 or slightly less than 90.

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