 Okay, so do we have an alkyl halide here guys? Yes. Okay, so what type of alkyl halide do we have here? Type of alkyl halide? Primary alkyl halide. What? Primary. Primary alkyl halide, right? So what type of reaction would you expect this thing to go through? An SN1 or an SN2? SN2, right? Because primaries only go through SN2 about substitution reactions, right? But to have an SN2 reaction, what do we also need to have in the starting materials? A strong nucleophile. A strong nucleophile. You see one of those in the starting materials presented. Yes, right? But they're attached to the same molecule, right? The strong nucleophile and the electrophilic carbon if you will, right? So what do you think is going to happen here? A ring? Yeah, it's going to react with itself, right? That's what happens, okay? A what? Fight club. Fight club, yes. It's exactly like fight club where he punches himself in the face. Exactly what's going to happen here. So what kind of ring, how many atoms are going to be in this ring? Five. Five atoms, right? Yeah. So one, two, three, four, five. Okay, so let's draw the mechanism for this reaction. Okay, so let's show, remember SN2 reactions like to attack from the what? Backside, right? So let's show the backside attack. Even though it's a primary, we're not getting like the inversion of configuration, right? It's good to still show it attacking from the backside. Like that? So is that the only reaction arrow? No, we have to show the other one too. What is that other one showing? The leading group. The leading group leading, right? Okay, so the bromine atom in the alkyl halide is the good leading group. So our product here, why don't you guys draw it out without looking up here? And I'll draw the leading group too. I mean, if you're reacting with yourself, you're going to form a ring, okay? Doing the fight club reaction. Let's call it that. Let's label on this board that we've done where the nucleophile, the electrophilic carbon, the leading group, okay? So where's the nucleophile? The alkyl halide. Yeah? The electrophilic carbon. The electrophilic carbon. Let's box it. Which one is it? The electrophilic carbon. Yeah? The carbon one, or the one the bromine is attached to? And the leading group? Where is that? The bromine. Yeah. Leading, like it leaves, okay? So this is an SN2 reaction. We call it an inner molecular SN2 reaction. Since it's bimolecular, what would be their rate of tonic substances that's technically the same molecule? Well, it's the one molecule reacting with itself. So it's just, hey, I'm the one molecule reacting with itself. It's like kind of a, you wouldn't get a rate determining step question. Yeah. I mean, the rate determining step, but you wouldn't be asked the rate of question. Yeah. Yes?