Final Answer:
The second resonance form for the structure shown below is:
[O-C-O]
Step-by-step explanation:
The structure shown below has two possible resonance forms, which are:
[O-C-O] and [O-C=O].
The first resonance form, [O-C-O], is the more stable form because it has a higher energy of resonance. This is because the oxygen atoms are more electronegative than the carbon atom, so they pull the electrons towards themselves, resulting in a higher energy of resonance.
To draw the second resonance form, we need to move one of the oxygen atoms from the first resonance form to the other side of the carbon atom. This creates a new resonance form, [O-C-O], where the oxygen atoms are now on opposite sides of the carbon atom.
The second resonance form has a lower energy of resonance than the first resonance form because the oxygen atoms are now closer to each other, which decreases the energy of the molecule. However, this form is still not the most stable form because the oxygen atoms are still more electronegative than the carbon atom, which results in a higher energy of resonance.
Therefore, the second resonance form of the structure shown below is [O-C-O].