Cyclooctatetraene dianion, C₈H₈^2-, is an organic ion with the structure shown. Considering only the p bonds and not the s bonds, cyclooctatetraene dianion can be described by the following energy diagrams of its p molecular orbitals:
(b) Three of the p molecular orbitals are bonding, three are antibonding, and two are nonbonding, meaning that they have the same energy level as isolated p orbitals. Which is which?

Question

Cyclooctatetraene dianion, C₈H₈^2-, is an organic ion with the structure shown. Considering only the p bonds and not the s bonds, cyclooctatetraene dianion can be described by the following energy diagrams of its p molecular orbitals:

(a) What is the hybridization of the 8 carbon atoms?

(b) Three of the p molecular orbitals are bonding, three are antibonding, and two are nonbonding, meaning that they have the same energy level as isolated p orbitals. Which is which?

Accepted Answer

Hello everyone today. We got the following problem. The structure of aniline is shown below focusing only on the pi bonds. Sigma bonds are not included. The pi bond, molecular orbital of annual in can be described by the following energy diagram identify which are the bonding anti bonding and non bonding molecular orbital's. So it's first important to define what each of these mean. So our bonding molecular orbital's or bonding mos or going to have lower energies, so it's going to have lower energy than our isolated p orbital's. And so that's therefore if it has lower energy than are isolated people riddles that's going to go ahead and place them as these three right here. So the blue box orbital's are going to be our bonding molecular orbital. Next we're going to define our anti bonding molecular orbital. So now we have our anti bonding molecular orbital and these are going to the opposite of our bonding, they're going to have higher energy that are isolated pure bittles. So if they have higher energy that are isolated pure metals, that's going to place them in our pink box here. And so all of the orbital's and our pink box are going to be our anti bonding molecular orbital's. And so that leaves us with our non bonding molecular orbital and this is essentially going to be equal energy. So their energies are going to be equal to that of isolated pure beetles. They're going to have the same energy as our isolated p orbital's. And so with that concept we can see that there are none. So there are no non bonding orbital's present. There are only our bonding and our anti bonding molecular orbital. And so with that we've answered our question overall, I hope that this helped, and until next time.

Verified Solution

Key Concepts

Molecular Orbitals

Bonding and Antibonding Orbitals

Nonbonding Orbitals