 So, like I was saying, you guys are going to help me out with this one, so flip to that page in your book if you don't know all your alkyne reactions yet. But this is a good one to help you remember what all your alkyne reactions are. So, in other words, we've got the starting material here, and with this starting material we can make several different products. In fact, more than this, we're just showing these ones. What it's asking us essentially is what are the reagents that are used to perform all of these tasks, right, to make these particular products? So, what I'm going to do is just throw it out there. Can anybody tell me any one of these reactions, what the reagents would be? The top left one, that's an easy pick-ins, right? H2 palladium, that'll work. Does everybody agree with that one? Okay, any other? HCl, the bottom one. Which is one of these down here, are you saying? I mean the top one. The top of here. Who are you tripping me out? This is HCl. How many moles of HCl are you going to use? Just one. That's what I was saying. Remember last reaction when I said, oh, like this one, we might should say two moles, but we were saying, well, we're not only just pumping one molecule of hydrogen gas in there. In this one they're trying to say, well, if you make your ratio one to one, you're going to get this particular product. What kind of addition is going on here? What kind of addition? Markovnikov, right? Because remember, what kind of alkyne is this here? Terminal, right? So it's got an H there, right? So where's the H going when we go here? To the right or left side? The right side, right? That's called what? Markovnikov, okay. Are there any other ones that we can do? Yeah, well, not two moles of Br2. H2 moles of HBr. What is this doing? What kind of addition here? Two times Markovnikov's addition. This is HBr. And we can say, if we want to specify two moles, we want to specify one mole. Okay? It'd be fun, okay? It'd be fun. This one, you might want to just say one mole, just so you know that I know that you know. But this one, if you just did HBr, okay? For us, in some other class, you might be made to say two moles, okay? Sorry, was there another question over here? Is that one? Yeah? So mercury, sulfate, what else? H2O. H2O and H2SO4. What's the name of that molecule H2SO4? Sulfuric acid. Sulfuric acid, very good. So that gives me, remember the intermediate? Do you remember the intermediate between there? What's that called? An enol. An enol, right? So that gives me what kind of addition of an alcohol? A carbonic acid, right? A carbonic acid, again. The cool thing is, there's not very many answers to these things, right? So why don't you know what you're supposed to say to them? The one on the left that's on the bottom. This one here? Yeah, BH3 and H2O3. Okay, so is that it? Just BH3? And H2O2 and THM. So, okay, BH3, THM, that's the first step, right? Okay, and then you have the second step, which is what? H2O2 and AOH, and usually they put water in here too, right? What kind of addition is that? Antimarkovnikov. Good job, Prussia. Do you see that it's antimarkovnikov there? So do you see that these are kind of giving you different regiochemistry, right? They're giving you a carbonyl, but on opposite sides of that triple lump. The former triple lump, that is. So we've got two more out there. The top one. Yeah, so H2 and Limler, you said? Yeah. H2 Limler, Limler's catalyst, we'll say. Okay, could you have done that one any other way? Yeah, you could have done. No, you can't, that one won't stop, okay? So don't ever put that. So you could have done this one instead, LI, NH3, like that. Either one would have worked, okay? It's because it's a terminal outcome. Okay, and the last one, anybody got it? No, look, so this one, how many carbons do we have here? So let's count them from here. One, two, three, four. Only a couple of us are counting, right? Four, right? So how many do we have here? One, two, three, any more? So what happened? What happened to this molecule here? That carbon on the an got cut off, right? So what does that? How many H2S of four? It's about O3. O3? H2. Where is it in here? I can't find it in here. Yeah. Well, so we do it a little differently than that. So I don't see it on that particular page. It's somewhere in the notes or in the chapter. So the first step is what did you say? O3. O3. And you can, you don't have to put the solvent in there. So the second step, right? What do we do for the second step? What was it? Okay.