favorable resonance structures

[Emily Hou 1H]

How do you know which resonance structure is most favorable/ contributes most to the real structure?

[805754009]

If the average bond length is closer to that of a single bond, then the structure with the most single bonds is going to be the most favored resonance structure. If the average bond length is closer to that of a double bond, then the structure with the most double bonds is going to be the most favored resonance structure. If the average bond length is the exact average between the two, then it would be the structure that has the same number of single and double bonds. Triple bonds can be factored into this concept in a similar way as single and double bonds.

[Ryan Blaydon 1K]

I believe you can also look at the formal charges of all of the elements in each structure. The structure with the least amount of formal charges will be considered more stable and will therefore contribute the most. A structure is also more stable if the negative formal charge is on the most electronegative element.

[Do Yeun Park]

Hi!
You would need to calculate the formal charge of each elements involved in the bonding. Structure with the least amount of formal charge, which would be 0, is the most stable.

[Sarthika Chimmula 3H]

The structure with the least amount of formal charges will contribute most to the real structure. Additionally more negative formal charges tend to go on the more electronegative element.

[Nithya Madhu 2L]

Hi,
To find the favorable resonance structure I usually check the formal charges of the structure. The structure with the least number for formal charges that are closest to 0 is the most favorable one. Also, the negative formal charge should be on the most electronegative atom. Hope that helps!

[JafarriNocentelli 1G]

I'm curious, what would happen if the two most stable structures had the same overall charge, what would we choose then?

[Carla Bruebach 1C]

I think #4 and #9 in the homework is the most helpful with this question. You can try to determine this using the average bond length or the formal charge.

[Olivia Ghorai 1J]

Hi!

In order to find the resonance structure that contributes the most, you need to calculate the formal charge of each of the elements within the lewis structure, and compare it to the formal charges on other resonance structures. The one with the lowest and least number of formal charges other than 0 is the one that is the most favorable.

[Maggie Messer 1A]

The most favorable resonance structure it the one that has the least amount of formal charge used. When each resonance structure's formal charges are added up, which ever structure shows the atoms with the least amount of formal charge, that is usually the best one to pick.

[Palig Kechichian 3F]

The most favorable structure would be that with the least formal charge. This would mean that the structure would be as stable as possible.

[Nicole 3G]

Finding the lowest formal charge can show you the resonance structure that you want to pick to represent the actual structure in real life.

[Peter Fernandez 2K]

The favorable resonance structure is the one that has 0 formal charge on every atom (or as close to zero) and also follows the octet rule (unless the atom can form more than an octet).

[Sophia Dominguez 3I]

A way to know which resonance structure is most favorable is to look at the formal charge. The most stable structure will have the lowest formal charge, making it the most favorable structure. Additionally, the structure with the negative charge on the most electronegative atom will be more stable.

[Madison Kiggins 1E]

The most favorable resonance structure will be the one with a formal charge closest to 0. Beyond that, it is more favorable for there to be a smaller number of formal charges on the contributing atoms (for example if the formal charge for the overall atom closest to 0 was -1 and there were three atoms, a structure with -1,0,0 would be more favorable than -1,+1,-1). Additionally, if there is a negative charge, we want that charge to be on the most electronegative atom.

[Bela Patel 2B]

If you look at the formal charges of all of the elements in each Lewis structure, then the Lewis structure who has the most neutral charge would be the more favorable Lewis structure.

[isabella garcia - 1G]

The favorable structure will be the one with the lowest/most neutral formal charges.

[NaomiAbramowicz1H]

The formal charge is the best way to do this! The favorable resonance structure will have charges closest to 0, with the most negative charge on the most electronegative atom.

[Alexis Rempillo 3B]

As everyone said here, the structure with the net charge lowest to 0 will be the most favorable. And also if my memory serves me, the bond length is also taken into consideration. So if there would ever be resonance structures with the same charge, we got to look at bond length too. Please correct me if I am wrong.

[Amy Huynh 1B]

Favorable resonance structures are those that have the least formal charges. If two resonance structures have the same formal charge, I believe we look at the individual atoms and the one where there would be more electrons given to the more electronegative atoms would be more favorable.

[Emily Quill 2H]

Hi! The most favorable resonance structure will have the lowest formal charges, or if there are formal charges present then those closest that cancel will be part of the most favorable structure.

[Hope Galarneau 1A]

I would always look at the formal charges to see which resonance structure contributes the most. When looking at the formal charges, you want to identify the one that has the formal charges closest to 0, as this will be the structure to contribute the most.

[EriMizuguchi2K]

Try calculating the formal charges of each atom in the molecule, and the structure with the least formal charges (closest to 0) is the most favorable resonance strucle.

[Hannah Thornton 1F]

The structure with the least amount of formal charges, ideally being 0, will be the most favorable structure. Stability also comes from having the negative formal charge on the most electronegative element.

[Abhinav Amanaganti 3K]

The most favorable resonance structures will be the one with minimal formal charges on each atom and this is because this structure will be the most stable, whereas resonance structures with maximal formal charges will be unstable.

[AJackman]

The one with the least formal charges (ideal is 0), is the most favorable. If that doesn't work, the most negative formal charge should be on the most electronegative atom.

[Naman Jain 3F]

The most favorable resonance structure would have the least amount of formal charge on its atoms (formal charge of atoms should be as close to 0 as possible). If any atoms have a formal charge, the negative formal charges should be on the more electronegative atoms. Additionally, same formal charges (e.g. two atoms with a +1) should ideally not be directly next to each other.

[haryn Shin 1H]

The most favorable resonance structure would be the one with the least formal charge in the central atom. Usually, the most favorable resonance structure has a formal charge of 0 in the central atom. Hope this helps!

[Rebekah Jung 1C]

The most favorable would be where there is the a formal charge of zero, or closest to zero. To calculate formal charge, take the valence electrons of the element and subtract (number of non-bonded electrons and number of bonds).

[Chris Van 2J]

A resonance structure is most favorable when there are the least amount of formal charges!

[asfakhan_2H]

To figure this out you could either look at bond length or find the formal charges. Finding the formal charges would be the most accurate in order to find which structure is the best or favorable. Textbook practice problems listed in the syllabus really help out with this.

[Brenda Tran 3C]

You can tell which resonance structure is most favorable by their formal charge. The charge that is closest to 0 or is at 0 would be most favorable.

[daniellediem1k]

A resonance structure is most favorable if the formal charges' sum is 0!

[Luke Hatch 1G]

The most favorable resonance structure is the structure that has the most formal charges close to 0. If a molecule has an oxidation number that is not 0, the formal charge should also equal that number. When not all of the atoms within the molecule have a formal charge of 0, the atoms with a negative formal charge should be the more electronegative atoms. Hope this helps!

[405479701]

The least amount of formal charge is most favorable.

[Natalie Quilala 1I]

In order to make sure the resonance structure is the most favorable, I would check the formal charges of each of the resonance structures and see which one is the most favorable from there. If there are more formal charges in one structure with a 0, then choose that structure for the most favorable structure.

[Coraly De Leon]

A resonance structure that has the least amount of formal charge will be the most favorable and vice versa.

[Renga Rengappa 1D]

IT will be the resonance structure with the formal charges spread out, adding up to the correct charge, and usually you dont want all the charge on the central atom.

[Cynthia_L_2C]

The resonance structure that is most favorable is the one with the least amount of formal charges. Either closer to 0 or at 0.

[Edriana J Altea 2G]

The resonance structure that would be considered as most favorable would be the one that has a formal charge close to 0 or 0. This means you might have to calculate the formal charge of each structure and then determine it from there.

[Victoria Sigala 2A]

If I'm not wrong, I think the resonance structure with the least amount of formal charge is most favorable. So a structure with a formal charge of 0 would be the best one.

[Morgan Micallef 1A]

You should calculate the formal charge for each atom and determine which structure has the lowest overall formal charge

[Jessica Sun 2I]

Resonance structures with the least formal charges are most favorable because they are more stable.

[205819952]

The structure with the least amount of formal charges will contribute most to the real structure.

[Alexis Shen 2G]

The structure with the total formal charges (total charges from each element added together) that have a value closest to 0 contribute the most. This is because there is not as much repulsion.

[Nathalia Garibay 1D]

Hi Emily.
So I believe the most favorable resonance structure is the one with the lowest formal charge which can be calculated using FC=V-(L+S/2)

[Nick Oscarson 1K]

When determining which resonance structure is most favorable, the formal charge must be considered. Here are some rules that point to certain structures being more stable and favorable:
1. Least number of formal charges
2. Any negative charge is on the most electronegative atom
3. Positive charge on the least electronegative atom
4. Formal charges spread out throughout the molecule

This link provides examples and even more detail as to how to determine the most favorable resonance structures! https://chem.libretexts.org/Bookshelves ... y_(McMurry)/02%3A_Polar_Covalent_Bonds_Acids_and_Bases/2.05%3A_Rules_for_Resonance_Forms