Resonance Structures

Moderators: Chem_Mod, Chem_Admin

Meredith2E
Posts: 89
Joined: Wed Sep 30, 2020 10:04 pm
Been upvoted: 1 time

Resonance Structures

Postby Meredith2E » Wed Nov 04, 2020 2:43 pm

Might be an obvious answer, but can anybody explain what is the difference between resonance structure and resonance hybrid?

Crystal Yu 1D
Posts: 163
Joined: Wed Sep 30, 2020 9:58 pm
Been upvoted: 12 times

Re: Resonance Structures

Postby Crystal Yu 1D » Wed Nov 04, 2020 2:45 pm

Based on what I understood from the lecture, resonance structures are all the possible structures when a single Lewis structure can't show the possible structure of the molecule. A resonance hybrid is the combination of all those possible resonance structures. Hope this helps :)
Last edited by Crystal Yu 1D on Wed Nov 04, 2020 2:46 pm, edited 1 time in total.

Alison Perkins 2B
Posts: 95
Joined: Wed Sep 30, 2020 9:57 pm
Been upvoted: 1 time

Re: Resonance Structures

Postby Alison Perkins 2B » Wed Nov 04, 2020 2:45 pm

Yes! A resonance structure can be any of the possible structures (ex: In C6H6 there are 2 resonance structures bc of double bond placement.
A resonance hybrid is the combination of all of these structures (ex: in C6H6 the diagram with the circle in the middle represents the resonance of those placements of double bonds.)
Hope that helps !

Melis Kasaba 2B
Posts: 91
Joined: Wed Sep 30, 2020 9:49 pm

Re: Resonance Structures

Postby Melis Kasaba 2B » Wed Nov 04, 2020 2:48 pm

I'm pretty sure a resonance structure is just one Lewis structure that can't completely describe the bonding. A resonance hybrid represents the overall delocalization of e– within the molecule by combining multiple possible resonance structures.

Stuti Pradhan 2J
Posts: 159
Joined: Wed Sep 30, 2020 9:32 pm
Been upvoted: 5 times

Re: Resonance Structures

Postby Stuti Pradhan 2J » Wed Nov 04, 2020 2:49 pm

A resonance structure shows a possible bonding arrangement, and there can be multiple resonance structures that all show possible arrangements of the bonds in the molecule. However, a resonance hybrid is an average of all the resonance structures, and it more accurately depicts the relative structure of the molecule.

For example, there are two resonance structures for benzene (with double bonds on one set of three C-C bonds vs on another set of three C-C bonds). The resonance hybrid includes a dashed line or a ring to show an average of both resonance structures and to display the delocalized electrons.

Hope this helps!

Meredith2E
Posts: 89
Joined: Wed Sep 30, 2020 10:04 pm
Been upvoted: 1 time

Re: Resonance Structures

Postby Meredith2E » Wed Nov 04, 2020 2:58 pm

THANK YOU ALL FOR THE HELP! This really does clear it up :)

Brianna Chen 3F
Posts: 98
Joined: Wed Sep 30, 2020 10:11 pm

Re: Resonance Structures

Postby Brianna Chen 3F » Sat Nov 07, 2020 12:48 am

A resonance hybrid is a structure that averages the bond lengths from all of the resonance structures, so it is basically a collective representation of a molecule.

Earl Garrovillo 2L
Posts: 91
Joined: Wed Sep 30, 2020 9:55 pm

Re: Resonance Structures

Postby Earl Garrovillo 2L » Sat Nov 07, 2020 6:56 pm

Resonance structures are the individual structures of a particular molecule. In a sense, it's each possible drawing where the bond(s) is/are shifting. The resonance hybrid is the mix of all these resonance structures. Like in the case of benzene, the resonance structures are the two possible hexagons with different bond configurations while the resonance hybrid is the hexagon with a circle in the middle signifying that the bonds are shared between all the carbons.

Akriti Ratti 1H
Posts: 90
Joined: Wed Sep 30, 2020 9:36 pm

Re: Resonance Structures

Postby Akriti Ratti 1H » Sat Nov 07, 2020 7:09 pm

A resonance hybrid is a combination of all the resonance structures.

George_Yin_3I
Posts: 50
Joined: Wed Sep 30, 2020 9:42 pm

Re: Resonance Structures

Postby George_Yin_3I » Sun Nov 08, 2020 4:13 am

Resonance structures are used when a single Lewis structure cannot fully describe the bonding. Resonance hybrid represents the combination of possible resonance structures.

George_Yin_3I
Posts: 50
Joined: Wed Sep 30, 2020 9:42 pm

Re: Resonance Structures

Postby George_Yin_3I » Sun Nov 08, 2020 4:13 am

Resonance structures are used when a single Lewis structure cannot fully describe the bonding. Resonance hybrid represents the combination of possible resonance structures.


Return to “Resonance Structures”

Who is online

Users browsing this forum: No registered users and 1 guest