 Let's write our nomenclature of, we'll do three functions together here, nomenclature of hd-height, nomenclature of cyanide, acid halide. See all these three functions we are doing together because of one reason. So what is acid halide? I'll do. Now we have written our C double bond O n. This is the anti-height, okay. Cyanide is this, C triple bond N, this is cyanide. Acid halide is C double bond O and halogen atom, X attached. Sir, what is it? OX. C? OX. Not OX, C OX. So they all have to, they all have to, they all have to, they all have to understand. Yes, yes, yes. Because they can't be like that. It is monovalent. So what is that? Halide, it can be anything, chlorine, chlorine, bromine, I think. Okay, okay. See the suffix of anti-height is L, A-L, alcohol is Paul. Suffix for cyanide is nitride. Suffix for acid halide is oil halide, oil halide, O-Y-L, okay. Now why we are doing this together? Because in all these functional group, we always include the carbon atom of the functional group, into the parent chain and we will start the numbering from this carbon itself. The position of this carbon is always first wherever it is present into the molecule, right? So write down, write down in all these functional group, in all these functional group, we include the carbon atom, we include the carbon atom of functional group into the parent chain and the position of, and the position of the carbon atom of the functional group, carbon atom of the functional group into the parent chain and the position of the carbon atom of the functional group is always the one. First position, we start numbering from that carbon itself. That's why, no. What did you write? Into the parent chain. Into the parent chain and the position of the C-atom, carbon atom of the functional group is always one. Reduce the temperature. Reduce the temperature. What is the name of this compound? See that is why these functional group never shows positional isomers. Since the position of these functional groups are always one, that's why they do not show positional isomers. What is the name of this compound? Formal. Formal D-atom is not the IUP. We can tell that sounds better. We can tell that sounds better. We can tell that sounds better. We can tell that sounds better. Only one carbon we have here. Only one carbon. So it is methanol. What is the name of this carbon? It has two carbons. We always start numbering from this carbon atom. So it is ethanol. Sir, you said these compounds can never have positional isomers. But what if they are in a compound with some other functional group which has a higher priority? Like carbons, cilic acid. This won't show. Carbons, cilic acid can't show. This won't show. Carbons, cilic acid also won't show. But if positional isomers is there because of any other functional group, that is fine. But this won't show. Yeah, it can't. Sir, believe me one question. What is the name of this compound? It is two cyclochemicals. Cyclochemicals P9. Two cyclochemicals P9. Two cyclochemicals P9. Two cyclochemicals P9. Okay, I'm off. Stop talking. Two cyclochemicals P9. You see the first question is this. One, two, three, four. Cyclochemicals P9. Is this P10? This is pH. This is C double bond O. There is once hydrogen present here, and usually it's our CHO. Usually, we write CHO, right? So you can write C-H-O, but you can write this way also, it's fine. It means, this carbon is 3-bond, it means 1 hydrogen is present here. This is a bond line formula. Sir, it will always have to be R behind it. Yes, if it is there on the terminal card. What is the name of this one? C-H-O. Like this we were talking about C-H-O. Here. This one. Which one? My mistake in the end. What's my mistake? The carbon is 5 times the hydrogen, it's 5 times the hydrogen. It's 5 times 5, this is the carbon. C-H-O. C-H-O. C-H-O. C-H-O. C-H-O. C-H-O. C-H-O. C-H-O. C-H-O. C-H-O. That's 6. What is the name of this carbon? Wind surgery. Can you guess the name? 2-methyl MURCYCELL. 2-methyl. 3-methyl. Yes that's 5, 10. 3-methyl. 3-methyl. Yes sir. 3-methyl. Someone three. Cyclo three. Two in the aisle. Two in the aisle. All out in the aisle. Two in aisle? This one? What's your idea to remove that? What is that the first time? The last store. I need something in the glass. No, no, no, the glass. Was there something before that? No, I think in the store. Yeah, yeah, yeah. It's correct. Ethane 1, 2 dial. Ethane dial also you can write. Because one carbon atom cannot take both double bond or double bond. It's not possible. Nitri, NITRI, Ni. How do you do it? Propane nitride. Methane nitride. Propane nitride. Propane nitride. Propane nitride. Propane nitride. C is the first one. He's talking about the one below it. We're a C-H to C-N. No, we are a C-N. Yeah, that's right. The car below the nice engine is the first car. I think it was like that. It's a beauty engine. Yeah, it's a beauty engine. No, that's not your main chain. This exact isn't your main chain. Your car is the first car below. Whenever you have a C-N, it's such a sweet bike. What is the name of this one? Yeah, yeah, yeah. Only one car by? Yeah. So it is. Methane nitride? Methane. Sir, it won't be good. Hyal nitride? No. It's just that this is made of ethane nitrides. It's not ethane nitride. Ethane nitride. Yeah, yeah. Look at your nose here. Two carbon ethane. Here we start. Now any from this carbon? Yeah. Right? One, two, three and four. So two. Three, two more, two methyl. First carbon is this. Beauty. So three, two more, two methyl. Three, two more, two methyl. What is the name of this one? It's two cyclobutane ethane nitrides. Hyal nitride. Hyal nitride. Hyal nitride. Hyal nitride. Hyal nitride. Hyal nitride. One. Hyal nitride. It is one, two, right? And this is the consequence. Yeah. Two cyclobutane ethane nitrides. Okay. We start numbing from this carbon atom. This carbon atom. This carbon atom. So it's three. How it is three? So it is one, two. No, no. Cyclobutane. Cyclobutane. Cyclobutane, one, two, three, four. So it is cyclobutane. Yeah. So the cyclobutane is the third carbon atom. No, it's not. When you say butane, it means this carbon. You're including it in the list. It's two cyclobutane ethane. Cyclobutane ethane. This one is two cyclobutanes. What is that? It's two of a. Phropane magnet. Yeah. Yes. Okay. What is the name of this number? What is the name of this number? What is the name of this number? What is the name of this number? What is the name of this number? What is the name of this number? What is the name of this number? What is the name of this number? What is the name of this number? What is the name of this number? What is the name of this number? What is the name of this number? What is the name of this number?