 So this molecule here, it says, is a cockroach repellent found in cucumbers. Okay, so the first thing we're going to do, so these cucumbers have this molecule in them that cockroaches don't like, yeah. So you can take this molecule out of cucumbers and make some sort of spray or something with it and, you know, cockroaches will go away. I assume. I haven't done this or anything. But anyways, this question asks us to identify the electrophilic centers in this molecule. Okay? So remember, electrophile means what? Electrons. Electrons. It likes electrons, okay? So it's going to have a what? Empty orbital. An empty orbital or? Positive. Positive charge. That's what we're looking for. Do we see anything that has a positive charge on this molecule? So what can we do to rearrange it to see these electrophilic centers? They're not being obvious to us right now, but what if we do, if we draw a what? Presenting structure. Presenting structure. It'll show us, right? So, should we draw one? You guys want to? Okay, let's draw one. Well, I was going to say, well, I was going to say it. We could just point them out without drawing them. But that's totally cool. We'll draw them. All of you guys are drawing this, right? Can we just do the one? Why not? Carbon would have how many bonds if we just did five, right? So we've got to do that. Okay, so that's going to be one. This one's going to show us one of the electrophilic centers. But I'm just going to do that for right now. Okay, is that correct? Or do I need something else? Charges. So where are the charges going to be? The negative charge there. And do I have a positive charge somewhere? Where? This carbon here, right? Let's make sure we're still in the frame. Barely. Okay. Well, we're going to have to do this one fast because the camera's dying. But anyways, so if I went back to this molecule here, could I find one of the electrophilic centers already? Could I box it in green? Where would it be? It's in the carbon. Okay, the carbon with the what? Oh, from over there. The positive charge, right? So that one, there. Okay, so remember this said that we have two of them. Can anybody figure out what the other one is? What would I have to do to find it? I'll draw another resonance form. So let's take it from here and do it. Any guess or should I do it myself? You can do the whole one back. Very good, yes. And then what would that show? I'll show you the total charge of the resonance. Yeah, so let's just draw that final resonance charge just like you said right there. So if we wanted to box in green on our original structure, where our other electrophilic center is, what would we box? The carbonyl carbon. Okay, the carbonyl. Okay, so those are the two electrophilic centers. The thing you want to take away from this problem is that carbonyl carbons are electrophilic. Okay? Also, carbons that are... So this would be alpha, beta. Do you see that? So alpha from the carbonyl carbon. One carbon away. Beta from the carbonyl carbon. Two carbons away. If you have an alpha, beta, unsaturated carbonyl group, remember unsaturated means doesn't have all the hydrogens on it, not an alkane portion. So alpha, beta, unsaturated, that beta carbon is also electrophilic. So carbonyl carbons and alpha, beta, the beta carbon from a carbonyl is electrophilic. Just the beta carbon. Question? Okay, cool. Sure.