ranking

Moderators: Chem_Mod, Chem_Admin

Karyn Nguyen 1K
Posts: 72
Joined: Fri Apr 06, 2018 11:04 am

ranking

Postby Karyn Nguyen 1K » Thu May 24, 2018 10:55 pm

How do we rank resonance structures in order of importance to the overall structure?

annie_finneran_1K
Posts: 37
Joined: Fri Apr 06, 2018 11:02 am

Re: ranking

Postby annie_finneran_1K » Fri May 25, 2018 7:16 am

by the formal charge. The most important is the lowest energy and the one with formal charges on each element closest to zero as possible.

vivianndo_1L
Posts: 30
Joined: Fri Apr 06, 2018 11:02 am

Re: ranking

Postby vivianndo_1L » Fri May 25, 2018 9:55 am

If the two resonance structures have the same formal charge, would they be considered equal in rank?

Harmonie Ahuna-1C
Posts: 30
Joined: Fri Apr 06, 2018 11:01 am

Re: ranking

Postby Harmonie Ahuna-1C » Sat May 26, 2018 9:55 am

vivianndo_1L wrote:If the two resonance structures have the same formal charge, would they be considered equal in rank?


I believe so

Isabel Jabara 1C
Posts: 34
Joined: Fri Apr 06, 2018 11:03 am

Re: ranking

Postby Isabel Jabara 1C » Sat May 26, 2018 10:27 am

If they have the same formal charge overall, choose the one with the smallest individual formal charges. For example, if one of them has -2 and 2, so the formal charge is 0, and the other has all 0's, the one with all 0's is ranked higher.

breannasung_1K
Posts: 30
Joined: Fri Apr 06, 2018 11:05 am

Re: ranking

Postby breannasung_1K » Sat May 26, 2018 5:23 pm

You rank the resonance structures based off the formal charges you find for each atom in the structure. The structure with the formal charge of 0 for the central atom is the most stable.

Nandhini_2K
Posts: 60
Joined: Fri Apr 06, 2018 11:03 am

Re: ranking

Postby Nandhini_2K » Sun May 27, 2018 1:03 am

By formal charge starting from the lowest close to the zero.

Sophie W
Posts: 17
Joined: Fri Apr 06, 2018 11:05 am

Re: ranking

Postby Sophie W » Sun May 27, 2018 12:04 pm

you calculate the formal charge of all the atoms, since the most stable structure will see that all atoms have formal charges close to zero

Rummel Requerme 1E
Posts: 35
Joined: Fri Sep 25, 2015 3:00 am
Been upvoted: 1 time

Re: ranking

Postby Rummel Requerme 1E » Sun May 27, 2018 7:36 pm

Calculate formal charge and try your best to have to be as close to 0 as possible.

Shione Nakahara 1F
Posts: 31
Joined: Fri Apr 06, 2018 11:04 am

Re: ranking

Postby Shione Nakahara 1F » Sun May 27, 2018 8:09 pm

A resonance structure has a greater importance if it fulfills the octet rule and if it has minimum charge separation. In addition, there should be no like charges on atoms that are next to each other.

Karyn Nguyen 1K
Posts: 72
Joined: Fri Apr 06, 2018 11:04 am

Re: ranking

Postby Karyn Nguyen 1K » Wed May 30, 2018 4:59 pm

vivianndo_1L wrote:If the two resonance structures have the same formal charge, would they be considered equal in rank?


Resonance structures are supposed to have the same formal charge, but they can differ in rank.

John Miller-1I
Posts: 29
Joined: Fri Apr 06, 2018 11:04 am

Re: ranking

Postby John Miller-1I » Sun Jun 03, 2018 9:52 pm

There can be many different resonance structures, but the ones with the lowest formal charge contribute the most to the resonance


Return to “Resonance Structures”

Who is online

Users browsing this forum: No registered users and 0 guests