 point I am trying to make is what? In acidic medium, we will try to get more stable alkene do not think about the stability of carbocation here. So, suppose if you have this example, this example we have discussed this already, I mean I am giving you this. Now, this reaction is taking place in acidic medium. We will get two different alkene here. So, one is this, when you get a double bond this side and the other one is this is a two product possible. Now, if I ask you which one is the major product? Which one is the major product? The major product will be the one which is the more stable alkene. See, what I said, see what I said. Let me finish. What I said, you have to see the more stable alkene, correct? Two different alkenes we get. Which one is more stable? That is what we are talking about. See listen to me. We are talking about the stability of alkene, right? So, stability of alkene is affected by hyper conjugation. If you talk about resonance, resonance is here also. Resonance is here also. Resonance is here also. So, resonance you cannot decide with respect to resonance here because in both the molecule. But hyper conjugative structure can be considered. How many alpha hydrogen we have here? This is alpha carbon, right? Two alpha hydrogen. How many alpha hydrogen here? More alpha hydrogen, see here and see. So, more number of alpha hydrogen, more hyper conjugative structure, more will be the stability of alkene. Secondly, what we can say that more substituted alkene is more stable. More substituted alkene is always more stable. Substituted means suppose the carbon, we have Cs2, Cs2, ethyl, right? All these things I have discussed. It is ethyl. Now, one hydrogen if you replace by Cs3, then this is substituted alkene. So, in comparison to ethyl, this one is more substituted, right? This one is more substituted. And number of alpha hydrogen here it is what? 3. So, we cannot also say that static effect makes it less stable. No, no. See, emotional look if you do not want to consider the static effect. Okay. Very, very static effect it cannot apply. However, if you place one more Cs3 here, right, then static effect is there. But alpha hydrogen is also increasing. So, that will stabilize this factor which dominates. Yeah, that is what alpha hydrogen dominates. Alpha hydrogen dominates. What is the alpha hydrogen? So, what is the alpha hydrogen? How do you think that I said? How many of you know about alpha hydrogen? See, India. India is a functional group. This carbon atom, this carbon atom is a functional group. Add to this carbon, whatever carbon we have, those carbons are alpha carbons. Okay. If carbon or shift, then it will be beta. Okay. If carbon or shift, then it will be delta. Gamma. Then delta. That is the definition. Okay. So, the carbon atom, adjacent to the carbon atom which contains the functional group or double bond. Double bond we can also consider as functional group. So, these carbon atoms are alpha carbon and all those hydrogen which are attached to the alpha carbon are called alpha hydrogen. Okay. This is a double bond. This carbon, this carbon is alpha carbon. Each carbon atom has three hydrogen. There are six alpha hydrogen percent. Clear? So, here we consider that double bond is the functional group. Yeah, double bond is the function. Why not OH? We are talking about, that's what. We are talking about the stability of alkene. Oh, so, this is what's changing here. Okay. Stability of alkene. Across this we are talking about. Right? Alkene may be have a conjugation possible. If you have to name this compound, then functional group is hydrogene. OH. Can you just give us these two components and double bond and say which is more stable we consider orange? Yeah. No. In that case, we have to please enol. This compound is more stable because of the stability of this double bond. Okay. So, since you don't let me explain what I want to explain, actually. So, the reactant is not alkene. No, it's not. So, will that almost completely convert to yeast? Not fully. In the mixture we have this, this and this present. So, can you say how much? No, that percentage we cannot say. But, for example, like the one example that I have taken in which one is aromatic, other one is not aromatic. In that case, we can say it is 100%. They won't ask you the percentage combination. Major or minor, you can say. Is it fine? Right? So, this alkene is more stable. And hence, this one is the major product and this one is the minor product. If they ask you the number of product, answer will be 2. Major product is this. Okay. So, in this case, you see, we are not considering the stability of carbocation. But, we are considering what? Stability of alkene. So, in acidic medium, we always check the stability of alkene. Now, suppose if you try to write down the mechanism of this, you see what carbocation we get. Okay. I am writing down the mechanism to make you understand. You won't write this mechanism always just for one example we are taking. Right? So, how do we write down the mechanism? You see the acidic medium reaction? We get H plus. So, this H plus what happens? It attach onto this oxygen atom. Like this. Okay. So, this comes over here and we get double bond OH positive charge. Fine. Now, this comes over here. So, we will get what? OH and positive charge. Okay. 2 degree carbocation we are getting. Okay. Now, from this hydrogen, this hydrogen, if it comes out, it forms what? This product, which is this one. If this hydrogen comes out, you will get this product. So, the one which gives more stable alkene, that will be the major product. Okay. And this hydrogen comes out. Okay. So, why is this H plus? Well, because it's not plus. This plus this. This plus this. Understood this. So, what do you have to do? You have to write down more stable alkene in acidic medium. More stable alkene in acidic medium. What is the product we get in this molecule? Major and minor product, tell me. Medium is acidic. So, is that distance too much? No. Hindrance and all, we won't know. So, like H can come from that also. This? No. No. No. We are getting anticent cardamom. Anticent cardamom. The combination is not there. Anticent cardamom. No. Why? It can't go from that. Because it's around the S3. Two-eighties, it is S3. No, wait, it is. This one is also S3. So, the one with the second one. This one. See we have one hydrogen here okay so we write out the triad here so 1, 2, 3, H will attach onto this oxygen right so one of the product is this H comes over here this bond pair comes over here this pi electron onto this oxygen and this takes this H plus so we have over here double bond and one methyl it is fine when this hydrogen takes part in the reaction right so this comes over here this goes here yeah no so it's it's 2, 1, 2, 3, H has 2 and then this one over there does only 1 and then this branch has 3 this is a 2 I mean again yeah no it's 6 it's 6 2 plus 2 plus 2 plus 2 I don't know what you are talking about yeah it's 6 just a second these two products possible any doubt on this any doubt on this now we have to find out major and minor right so we will count towards we'll check the stability of alkyl How many alpha carbons we have, 1, 2, and 3 plus 2 plus 2, I told you 7, CS3, so 4 plus The other alpha carbons are this, 1 and 2, only 2 alpha carbons here, so number of alpha hydrogen is 2 plus 1, 3, more alpha hydrogen, more Stimul, this is major, and this one is minor. Sir, but what is conjugation in the ocean? We do not have conjugation here. Sir, we need a conjugation for space. It is not a space, try it. Sir, for the stimulation, we always come to alpha hydrogen. And in really alpha hydrogens. What I mean by alpha hydrogens? Tell me the true structure, fundamental structure possible in this molecule. Medium in acidic. Oxygen sir, also in totomer is in acidic and always form alkene. Always form alkene. You will get alkene only. Sir, it is possible to get anything. No, you won't, you won't get anything. Means functional group can be different, depending on amide, amide or whatever we have, but double bond carbon must be there. Alkene derivative you can get. Sir, here, as the hydrogen, we take priority even over mass and inspect. If one of them can resist. No, it is not about priority. You get two different products. With two different types of isomer, totomer is in here. Right. This carbon atom, this gives you triad, right? But we have here conjugation. This gives you space. So we will get triad plus space, right on the both products. Triad plus space. Sir, space can do as it is. Space can do as it is. Sir, space can do as it is. No, that again we will see the stability condition there. What, first write down the product, then we will see which one is most there. See, because it has to get... This carbon is SP3. No, it is space. And it has two hydrogen present here. One, two, three. It is triad. But here we have conjugation, pi, sigma, pi. This carbon is SP3. This gives you space totem. So we would have a product fixing. And then we will see which one is most different. So suppose here, see here. If this hydrogen takes part in reaction, this comes over here, this comes over here, this comes over here. And the product is... Is this fine? Right? Another product is what? This comes over here and this comes over here. Plus... Which one? Pink one. This is, this is what? This is what? And this is? You see, in a given molecule, you can have triad and space both possibilities. The major product in this is blue. Will be the blue one. Because here we have extended conjugation. Here we have cross conjugation. Okay. Because extended conjugation. Loan pair, sigma, pi, sigma, pi. So is it primary order for deciding the stability of your totem? No. For that we have basic, you know, concept of GOC that we have. Compact triad. Not always. It is major because of extended conjugation. Depends upon the structure. Depends upon the chemistry. Extended, extended always dominates over. Of course that extended means if we have to use... Both extended means we'll see more conjugation. Where else pyrology is fine? It is not... See, alkene, so this one is hyper conjugation. But here we have resonance. So hyper conjugation let it be. Resonance, anyways dominates hyper conjugation. So I don't like... See, extended means the resonating structure, the shifting of electron pair will be in one direction. Like you see, this lone pair comes over here, this goes over here and then this comes over here, this comes over here. So this is one direction, right? But here you see it can go this way or this pi, sigma, pi, even go this way also. Two different directions we have. That is cross conjugation. Take care. Bye.