Resonance Structures and Molecular Shape

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

Moderators: Chem_Mod, Chem_Admin

Melanie Krahn 1C
Posts: 55
Joined: Wed Sep 30, 2020 9:34 pm

Resonance Structures and Molecular Shape

Postby Melanie Krahn 1C » Sun Nov 29, 2020 9:34 pm

How does molecular shape impact resonance structures? Will resonance structures always have the same shape as one another or are there exceptions?

dana hu 1B
Posts: 70
Joined: Wed Sep 30, 2020 9:37 pm
Been upvoted: 2 times

Re: Resonance Structures and Molecular Shape

Postby dana hu 1B » Sun Nov 29, 2020 9:54 pm

hello! no that is not the case. Resonance molecular structure will not always be the same shape.

Lauren Mungo 1K
Posts: 60
Joined: Wed Sep 30, 2020 10:08 pm

Re: Resonance Structures and Molecular Shape

Postby Lauren Mungo 1K » Sun Nov 29, 2020 9:56 pm

No they will all not necessarily have the same shape. I would assume that you would be asked for the shape of the most stable resonance structure.

Alan Huang 1E
Posts: 57
Joined: Wed Sep 30, 2020 9:37 pm

Re: Resonance Structures and Molecular Shape

Postby Alan Huang 1E » Sun Nov 29, 2020 10:05 pm

It's more so that resonance structures explain molecular shape of a molecule rather than the other way around.

The combination of resonance structures each adds a specific part to the overall resonance hybrid and overall shape of the molecule.

For example, carbonate ion CO3 2- would be predicted to have 2 C-O bonds of one length and a C=O bond of a shorter length.
However, experimentally it's found that all bonds are the same length because of the various resonance structures that add to the hybrid.


Return to “Determining Molecular Shape (VSEPR)”

Who is online

Users browsing this forum: No registered users and 2 guests