Learn about Organic Chemistry 15, in this comprehensive video by bannanaiscool.
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Rob Lederer: Okay and then there is couple more reactions right here. How will this one appear? So, what do going to get there? What's going to happen here? We got a double bonded hydrocarbon here, so it's an alkene. What's the name of it? Longest continuous chain, one including the double bond, 1, 2, 3, 4. So it's a butene with a methyl at the two. So, its 2-methyl butene right and that's two of the butene is going to react with this. so who knows the answer? I do chemguy I do. What is it? Oh it's an addition reaction. Put all the two Os. No, look whenever you see a plus O2 don't get freaked out. It's not liking adding Cl2 or I2 or Br2 or F2 and any of those halides. this is oxygen and so what we are going to get here and -- do this. Go, try and, be aware stay awake. Co2 plus H2O, ladies and gentleman, that's just hydrocarbon combustion. O2 is going to burn in right. That's the type of reaction it's going to be. it could be substitution, it could be addition. its going to be way more vigorous where electrons are going to be whipped around and exchanged and we are going to get something that ends up, you know redox reaction and that if what's going to happen and all you have to do then is be able to say CO plus O2, make Co2 and H2O. That's how to carbon combustion. Now four carbons there, so we put a four there. How many hydrogens? -- because that's an alkene CnH2n and so therefore if there is actually four carbons there, sorry one, two, three, four, five carbons there, its going to be 10 hydrogens and so that mean we are going to put five there. what I am going to put from there eight plus five is thirteen. So, I can put thirteen halves here and that's balanced. so you are going to say my teacher won't let that happen. Okay, then multiply everything by two, so it's 2, 13, 8 and 10, right. last type of reaction is kind of opposite of an addition reaction. it's called elimination. So, just remember, the opposite of addition add together is to eliminate, to take away. So if you have this molecule here in concentrated sulfuric acid, this what can happen. and usually there is not any other reactant. There is just one. So, I will tell you that's pretty much an elimination reaction. What you are going to eliminate? well, what we can do and an obvious type of elimination reaction is to create water from an alcohol because, actually you can take water and make an alcohol. in an addition reaction, you can take an HoH and perform a substitution, an addition, where you put on a H an OH onto a double bonded molecule, here we are going to recreate the double bonded molecule. So we take the H and OH off and we make HOH and then we take this molecule and we take only these two bonds and what we end up doing is we end up with putting back in a double bond. so we are going to have CH3 and it's going to be bonded to this which is then going to be a carbon with another CH3 group on it up here and a double bond to another carbon with two CH3 groups on it there. You could see that, if you just take those out and put an double bond in here, you will get that and then of course plus water. Oh, now what is the name of that right there one, two, three, four is the longest continuos chain of carbons. with two methyl groups on and ene that's located in the middle of four. So, it's going to be buta and it's going to be where is the ene, its going to be at the two. So, it's bute do not say buta just But 2 ene with methyls on the 2, 3-Dimethol But 2 Ene. So, that is another type of reaction that is the combustion or hydrocarbon combustion and then when you are reforming those double bonds, that's elimination.