Bond Angles in Square Pyramidal and T-Shaped

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

Moderators: Chem_Mod, Chem_Admin

Reina Robles 2B
Posts: 71
Joined: Fri Aug 09, 2019 12:16 am

Bond Angles in Square Pyramidal and T-Shaped

Postby Reina Robles 2B » Wed Nov 20, 2019 1:33 pm

Hi, I'm a little confused.

Are all the bond angles in square pyramidal (AX5E) 90 degrees? What about the bond angle between the two equatorial atoms? And doesn't the lone pair also affect the angle?

And with t-shaped (AX3E2, AX3E3), are the bond angles 120 and 90 degrees even though there are lone pairs?

Thanks!

Kavya Immadisetty 2B
Posts: 106
Joined: Sat Aug 24, 2019 12:17 am
Been upvoted: 1 time

Re: Bond Angles in Square Pyramidal and T-Shaped

Postby Kavya Immadisetty 2B » Wed Nov 20, 2019 2:41 pm

The bond angles in a square pyramidal are slightly less than 90 degrees because of the extra repulsion of the lone pair. The electron geometry is a octahedral so all the bond angles are the same (the term equatorial atom is used for trigonal bipyramidal). For T-shape, the bond angles will always be slightly less than 90 degrees.

Alfred Barrion 2H
Posts: 100
Joined: Sat Jul 20, 2019 12:16 am

Re: Bond Angles in Square Pyramidal and T-Shaped

Postby Alfred Barrion 2H » Wed Nov 20, 2019 3:17 pm

In a square pyramidal all angles are <90 degrees
In a t-shape the angles are <90 degrees

sarahsalama2E
Posts: 164
Joined: Fri Aug 30, 2019 12:16 am

Re: Bond Angles in Square Pyramidal and T-Shaped

Postby sarahsalama2E » Wed Nov 20, 2019 5:01 pm

I thought T-shaped had more than one bond angle does it not?

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

Re: Bond Angles in Square Pyramidal and T-Shaped

Postby KnarGeghamyan1B » Wed Nov 20, 2019 5:57 pm

T shaped has a less than 90 degree angle for all of the angles between the bonds that form the actual T, but the 2 lone pairs at the top that repel each other are what forms the 120 degree angle with the bottom atom of the T.


Return to “Determining Molecular Shape (VSEPR)”

Who is online

Users browsing this forum: No registered users and 1 guest