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:

(c) Complete the MO energy diagram by assigning the appropriate numbers of p electrons to the various molecular orbitals, indicating the electrons using up/down arrows 1c T2.

Video transcript

Hello everyone in this video. We're given the structure here. This is F c four H 42 minus. The question reads if we scroll down, it says to assign the proper number of pi electrons to the various molecular orbital's to complete the M. O. Energy diagram you can use up and down arrows to indicate the electrons. So we'll just fill in this right here. Taking a look. So again scrolling back up which is a bit. We see the structure here. We know that we have these hidden hydrogen atoms. So go ahead actually draw those in and we know that each corner contains a carbon so we can go ahead and see that all carbon atoms. So here here here and here are all surrounded by three electron groups. So if we just focus on this carbon here, I'll draw in a C. For carbon, we see that this carbon is connected to not only one hydrogen but also connected to two other carbons here and here. Right. So if we have those three then we do have these three electron groups. So we can say that all carbon has three atoms attached. We have three electron groups. This gives us an sp two hybridization with one. It's very draw this. Alright, this clear one p orbital. So then we have four carbons in this atom or in this molecule each having sp hybridization with one p orbital. So times one that gives us four pi electrons and we see here we have a two minus that means we have two extra electrons. So I actually add this as well to our some and that gives us a total of well four plus six is or four plus two is equal to six. So we'll have a total of six pi electrons. So using this information will go ahead and fill out this M O energy diagram. So we'll have 12345 and six to fill out the M. O energy diagram. And then this right here, then is going to be my final answer for this problem.