Bond Angles

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

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Izzie Capra 2E
Posts: 103
Joined: Sat Sep 07, 2019 12:19 am

Bond Angles

Postby Izzie Capra 2E » Tue Nov 19, 2019 7:47 pm

Say you have a molecule with VSEPR equation as AXE3. Although the electron geometry is tetrahedral (meaning bond angles of 109.5), the actual molecular shape is linear (180). Would this molecule would have bond angles of 180 since it is ultimately linear?

Same thing with AXE2... Trigonal planar electron geometry but realistically is linear. So bond angles 180 or 120?

Hiba Alnajjar_2C
Posts: 108
Joined: Fri Aug 09, 2019 12:17 am

Re: Bond Angles

Postby Hiba Alnajjar_2C » Tue Nov 19, 2019 7:51 pm

Yes, it would have a bond angle of 180 degrees. And for AXE2, it should also be 180 degrees. The molecular geometry indicates the actual observed shape since it accounts for repulsion from lone pairs, while the electron geometry just indicates the number of bonding domains. Therefore, you should account for the molecular geometry and lone pairs' repulsion to find the bond angles (aka look at if it's linear rather than if it's tetrahedral when finding bond angles)

Cooper Baddley 1F
Posts: 100
Joined: Wed Sep 18, 2019 12:19 am

Re: Bond Angles

Postby Cooper Baddley 1F » Tue Nov 19, 2019 8:06 pm

Yes, bonds are calculated with the electron pairs added in so even though there is a certain amount of density spots some are electron pairs that repel the actual bonds off of there new position.

Kavya Immadisetty 2B
Posts: 106
Joined: Sat Aug 24, 2019 12:17 am
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Re: Bond Angles

Postby Kavya Immadisetty 2B » Tue Nov 19, 2019 8:25 pm

Also for the specific formulas you're asking about, there's only 2 atoms so they can only form 180 degree angles. Just cuz any two points can make a straight line.

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