 No, it's not a solvent. Alcoholic KOH we are using and we have a mixture of KOH and NH2, two different solvents. Solvents is alcoholic KOH. So the reaction here is C, C, H, B, R. Not only of the rate of a slow or fast, but the product will be safe. So slow if you are definitely. If the bond association is different. Forms, let's see triple bond, C, H. And we get two molecules of H, B, R. Next method of filtration. Sir, does it have to be miscellaneous dihalytes or can it be on any card? For this, we can mainly be miscellaneous. You can have them also, zentalhylides, but that reaction will generally, it's not very easy to process with this combination. So mainly for this reagent, we are using miscellaneous dihalytes. Zentalhylides, you can also prepare alkyne, but the method is different. Next right now, by heating, second method of preparation, by heating 1, 1, 2, 2 tetrachloroethane. This is a small chapter alkyne, very few reactions. 1, 1, 2, 2 tetrachloroethane with zinc in methanol, zinc in methanol. C-HCl2 with C-HCl2 plus ZN C-H3OH. The product here is C-H triple bond C-H plus ZN C-H2. This is the product. Sir, if you have more alkyne, we have more alkyne. Right down next, by heating halopharm with silver powder. Silver, silver powder means powder form. Halopharm with silver powder. It is similar to Buj reaction. C-HX3 plus 6 moles of silver plus... When you heat this A-G-H-X forms and make it acetylene. It is not Buj reaction, it is similar to this. Buj reaction is from the preparation of only alkyne mainly. But in Buj reaction, we have one more ionic mechanism also possible. It forms alkyne also, but it is useful for the preparation of symmetrical alkyne. Because sir, we had a question in the assignment where we asked him. See, Buj reaction, we haven't discussed the ionic mechanism of that. Pre-radical mechanism gives you only alkyne, symmetrical alkyne. Ionic mechanism gives you alkyne plus alkyne both. Which one? See, we are taking halopharm like this. Halopharm will formalize this one. Halopharm like C-H-C-H. This one, okay, right on. By heating halopharm with silver powder. This same one. By heating halopharm with silver powder. See, C-H-C-L-3 is what? You must have heard the name. Clutopharm. Eidopharm is C-H-I-3. Okay, that is halopharm. It can't be R-C. Yes, R-C-C-L-3. Right on. Next one. By hydrolysis of certain carbides. By hydrolysis of certain carbides. Carbides like calcium carbide C-H-C-O2. Calcium carbide C-H-C-O2. On hydrolysis. It forms, that's the deal. Plus C-H-O-H-O2. This one is important. Calcium carbide keeps you acetylene, not methane. Magnesium carbide we can authoritate. D-H-3 C-H-C-H. Propine. Plus M-G-O-H-G-O2. Both reaction are important. Now those structures. Thank you. Last one from methane. From methane. C-H-4. Two method of preparation we have. Two moles of this. It's different than that. It's not same. For calcium it is exceptional. M-G-2 C-H-C structure is this. C double bond. C double bond C. Magnesium won't form double bond. M-G. M-G. I think this is as good as possible. Exactly what I said. How does it form double bond? How does it form double bond? It is not stable. It is not stable. Not at all stable. We can prepare the carbides of Magnesium. You can put calcium carbide. Magnesium and Magnesium form bonds. See it's not like... Magnesium and Magnesium form bonds. You have to provide the conditions. It's the same. We have given iron bonds. You provide the condition problems. You see calcium carbonate. You can obtain from C-H-C. So in this there is one action. Jumping. C-H-C. C-H-C. And then this C-H-O with carbide. Around 3000 degrees C-H-C. It converts into C-H-C. And oxygen molecules goes out. With carbide. C-H-C. You see this is not like it forms easily. We are forming it under this condition. Right. So you can form Mg2 C3 also. Providing this kind of reaction. On its own at one time. I was... Okay. So this you see. From in the last preparation method. Electric arc. When you give. Acetylene. C-H-C-H. Hydrogen gas. This is one method. Electric arc. Very high temperature. Preparation from methane. Two methods. And one more we have. Bipartial oxidation. Bipartial oxidation. Bipartial oxidation. It converts into. Acetylene. Carbon monoxide. We do not have like mechanism with it. Alkene. The most important reactions are these two. Hydrolysis of carbides. No that is not right. This one. Double ponder over everywhere. This is only methane. Only methane. Method of preparation of acetylene. Magnetium carbide. Yeah. Ok. So next class will finish this. Ok. We will. We will do that. We will do next class. Now we will have a test.