Organic Chem - Resonance Structures #2

In summary, resonance structures are different ways in which electrons can be delocalized within a molecule, affecting its stability, reactivity, and physical properties. The major resonance contributor is determined by following certain rules, and cannot be accurately represented by a single Lewis dot structure. To draw resonance structures, atoms with lone pairs or double bonds are moved around while keeping the overall molecular formula and number of valence electrons the same. Resonance structures can have different bond lengths due to electron delocalization, with the actual molecule having an average of the bond lengths from the different resonance structures.
  • #1
RLB31384
7
0
[SOLVED] Organic Chem - Resonance Structures #2

Homework Statement



Trying to figure out this resonance structure...Draw the lowest energy alternative..

http://img162.imageshack.us/my.php?image=553562cu7.jpg


The Attempt at a Solution



ive been trying to move the upper double bond to the right, but i keep breaking the octet rule...can anyone help?
 
Physics news on Phys.org
  • #2
nvm...figured this out too...not sure why I didnt try this sooner...just move all the double bonds over one...
 
  • #3

I would like to clarify that resonance structures are hypothetical structures that represent the delocalization of electrons in a molecule. They do not actually exist in a physical sense, but rather serve as a tool for understanding the electronic structure of a molecule.

In this case, the molecule shown in the image does not have any resonance structures as all the atoms have a complete octet. The double bond between the oxygen and nitrogen is already delocalized, meaning that the electrons are shared between the two atoms. Moving the double bond to the right would result in an incomplete octet for the nitrogen atom, violating the octet rule.

It is important to note that resonance structures are not interchangeable and do not represent the actual structure of the molecule, but rather contribute to its overall electronic structure. I would recommend reviewing the concept of resonance and its limitations in order to better understand this molecule.
 

Related to Organic Chem - Resonance Structures #2

1. What are resonance structures and how do they affect organic chemistry?

Resonance structures refer to the different ways in which electrons can be delocalized within a molecule. This can affect the stability, reactivity, and physical properties of the molecule, making it an important concept in organic chemistry.

2. How do you determine the major resonance contributor in a molecule?

The major resonance contributor is determined by following the rules of resonance, which include: 1) the most stable structure has the fewest formal charges, 2) the most stable structure has the least separation of opposite charges, and 3) the most stable structure has the negative charge on the most electronegative atom.

3. Can resonance structures be represented by Lewis dot structures?

No, resonance structures cannot be accurately represented by a single Lewis dot structure. Instead, they are represented by a combination of multiple Lewis dot structures, with the true structure being a hybrid of all possible resonance forms.

4. How do you draw resonance structures for a molecule?

To draw resonance structures, identify the atoms with lone pairs or double bonds and move them around to different positions while keeping the overall molecular formula and number of valence electrons the same. Remember to follow the rules of resonance to determine the major contributor.

5. Can resonance structures have different bond lengths?

Yes, resonance structures can have different bond lengths due to the delocalization of electrons. The bond lengths in the actual molecule will be an average of the different bond lengths in the resonance structures.

Similar threads

  • Biology and Chemistry Homework Help
Replies
9
Views
1K
  • Biology and Chemistry Homework Help
Replies
1
Views
3K
  • Biology and Chemistry Homework Help
Replies
1
Views
1K
  • Biology and Chemistry Homework Help
Replies
1
Views
5K
  • Biology and Chemistry Homework Help
Replies
1
Views
6K
  • Biology and Chemistry Homework Help
Replies
3
Views
2K
  • Biology and Chemistry Homework Help
Replies
2
Views
4K
  • Biology and Chemistry Homework Help
Replies
2
Views
3K
Back
Top