 Okay, so this is how you make a carboxylic acid or one of the ways. Does anybody remember what this type of molecule is called? Something with a magnesium bromide, maybe somebody else. Grignard, right? It's a Grignard. What is this over here? Carboxylic acid. We're in the carboxylic acid. Okay, so This is taking a Grignard reagent to a carboxylic acid, so it's a pretty useful reaction, so you can install, you know, so you had to begin with here an alkyl bromide, right? Then you added magnesium and diethyl ether, right? Diethyl ether is the solvent there. You made your Grignard reagent, okay? Then you react that with carbon dioxide first, okay? So you can do this in a couple of ways. You can throw some dry ice into your reaction, or you can bubble carbon dioxide through it, okay? And then after you do that step, then there's a second step where you add acid, okay? So we're going to do this mechanism. This will be the last mechanism we do today. Can't raise that part. This bond here. If you recall from last chapter, it's not, you can think of it not really as a covalent bond, even though magnesium is very small, it's also a metal, right? So usually if we think back, way back to Jen King, right? We, when we have metal non-metal bonds, we usually call those ionic bonds. This is a mo, like a kind of ionic kind of covalent bond. So you can think of it like that. Carbon dioxide, hopefully you recall again from general chemistry, the structure of it, and your molecule that looks like that. So in fact, carbon dioxide looks very much like, right, a carbonyl functionality. In fact, it's a super carbonyl. It's got like two carbonyls on top. And what do we know about a carbonyl carb? Super electrophilic, right? So would you imagine this to be more or less electrophilic than like a ketone? Way more. Why? You've got two oxygens pulling those charge away from them, okay? So this is super duper positive, right? So what's going to happen? Going to attack that carbonyl carbon. You can't have five bonds, so one of those bonds has to move up. Like that. So that's the first step of making it. But we also have our magnesium bromide, the R-counter ion, and our acid. So remember, we just said H3O plus, so this is like sulfuric acid and something, you know. What's that going to do? Protonate the carboxylic acid oxygen, deprotonating the hydronium ion, giving us R-carboxylic acid. And again, I just have this twisted into a weird confirmation because of how I showed this. So don't get too excited about it. Just like if I was a younger person, I could probably stand up like, okay, do you know what I'm saying? So the carboxylic acid could do the same thing. So we took a greener reagent here. Always a carboxylic acid. I remember we made this from an alkyl haline. So that's a pretty cool synthesis, okay? And then from that you can make more stuff, you know, which we'll go on to talk about next time, okay? So are there any questions about this one? So remember, there's that typo that I wrote here.