Bond Angles

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

Moderators: Chem_Mod, Chem_Admin

Rebecca Altshuler 1D
Posts: 61
Joined: Fri Sep 28, 2018 12:15 am

Bond Angles

Postby Rebecca Altshuler 1D » Wed Nov 14, 2018 1:07 pm

When looking at molecular shape, is there a difference in bond angles if the area of electron density is caused by a lone pair or a bond? Does one have a stronger pull?

Posts: 60
Joined: Fri Sep 28, 2018 12:16 am

Re: Bond Angles

Postby klarratt2 » Wed Nov 14, 2018 1:10 pm

Repulsion strength is strongest between two lone pairs of electrons and weakest between two bonds (repulsion strength between a lone pair and a bond is in between these two). Therefore, lone pairs have a bigger effect on the bond angle than a bond.

Posts: 71
Joined: Fri Sep 28, 2018 12:15 am

Re: Bond Angles

Postby Noh_Jasmine_1J » Wed Nov 14, 2018 1:30 pm

Lone pairs have greater repulsion than bonds and therefore cause the bond angles to be smaller than expected

Olivia Young 1A
Posts: 60
Joined: Fri Sep 28, 2018 12:24 am

Re: Bond Angles

Postby Olivia Young 1A » Wed Nov 14, 2018 1:50 pm

The order of repulsion strength in bonds from strongest to weakest is: lone-lone pair, lone-bonding pair, bonding-bonding pair. Therefore, lone pairs have the most repulsion strength among electrons. This causes bond angles to decrease because the strength of the lone pairs force the bound pairs to be closer together under VSEPR theory.

Return to “Determining Molecular Shape (VSEPR)”

Who is online

Users browsing this forum: No registered users and 2 guests