T-Shape

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

204929947
Posts: 76
Joined: Fri Apr 06, 2018 11:03 am

T-Shape

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
Posts: 31
Joined: Fri Apr 06, 2018 11:04 am

Re: T-Shape

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.

nelquosey
Posts: 31
Joined: Fri Apr 06, 2018 11:02 am

Re: T-Shape

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

Ismail 1F
Posts: 32
Joined: Wed Nov 15, 2017 3:02 am

Re: T-Shape

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
Posts: 31
Joined: Fri Apr 06, 2018 11:05 am

Re: T-Shape

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
Posts: 32
Joined: Wed Nov 15, 2017 3:04 am

Re: T-Shape

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.

LeannaPhan14BDis1D
Posts: 57
Joined: Fri Sep 28, 2018 12:16 am

Re: T-Shape

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.