Organic chem, resonance structure

[Grapz]

Homework Statement

Are these two structures resonance?

if not why not?

Homework Equations

The Attempt at a Solution

I drew these resonance forms myself, but the answer book didnt' have this resonance structure in its answer and i wanted to know if this indeed is a resonance form.

I ask because one has total charge of -2 and other one is neutral

 

[chemisttree]

No, they aren't resonance structures. The reason is:

one has total charge of -2 and other one is neutral

Resonance forms don't result in a net change of charge. That's a redox effect...

 

[Blueshift5]

Resonance structures refer to the different possible ways in which the atoms in a molecule can be arranged while maintaining the same overall connectivity. These structures are represented by drawing multiple Lewis structures, each with different arrangements of electrons and formal charges. In order for two structures to be considered resonance structures, they must have the same overall connectivity and differ only in the placement of electrons and formal charges.

Based on this definition, it is not clear if the two structures provided are resonance structures or not, as there is no information about the overall connectivity of the atoms. However, if the two structures have the same overall connectivity and differ only in the placement of electrons and formal charges, then they can be considered resonance structures. The fact that one structure has a total charge of -2 and the other is neutral does not necessarily mean they cannot be resonance structures, as the overall charge can change between resonance structures. It is important to note that resonance structures are not individual molecules, but rather different representations of the same molecule.