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Organic Chemistry
Learn the toughest concepts covered in Organic Chemistry with step-by-step video tutorials and practice problems by world-class tutors.
20. Carboxylic Acid Derivatives:NAS
Naming Amides
Amide s aren't horribly difficult to name. Once we figure out the suffix, then all that is left is to name the R groups that come off the nitrogen. So don't be suprised if N,N is in your name somewhere.
1
concept
Amide Nomenclature
1m
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time to learn how to name AM IDs. So Amador Carlos, like acid derivative. So again, pretty much everything that applies from a car oxalic acid derivative applies to Anam it. We're going to replace the e ending of the parent chain with the Suffolk Sex A meid. Okay, so that's pretty straightforward. Now, the Onley thing that complicates an AM it is that you've got the possibility for multiple are groups on the end. Okay. It's not like an Esther, for example. Remember that in Esther, you could only have one. Our group on it. Oh, that's it. So it's easy, but for nitrogen compounds, you conform. Three bonds. Some things we could have up to three things coming off of that end. Well, you're gonna name them as substitue INTs either on the end or n n positions. Okay, so it's just easier if I show you an example. This general structure would be I guess n kama end dime Ethel notice because I have methyl groups coming off of it, and then it would be Alcan a mind. Okay, of course. I'm waiting to know what the You know what the identity of that our group is to figure out what I put here. Okay. You could use common names or AIPAC names. Just remember, toe change your locations. Descriptions with numbers or Greek letters, depending on which one you're using. Okay, so you guys are all set to start this example. Go ahead and try to name it, and then we'll help out.
2
example
Name the molecule
2m
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Alright, guys, let's do the AIPAC name first. So the AIPAC name would be four carbons. I would have a butin OIC acid. Wow, that is not beauty annoyed, butin No wick, but I'm going to change it to butin a mine, right? Awesome. Is this becomes a butin? Um, I What substitutes do I have? Well, because the fact that this is AIPAC, I could just use numbers, so it would be too three. So this is looking like a dime Ethel and ah, hydroxy age comes before em. So it's gonna be in terms of the route name. It's gonna be two comma. Oops, Just second hydroxy comes first, so it's gonna be three hydroxy two comma three dime Ethel Beauty 10 a mind. Perfect. But we're not done. We need to name the alcohol group on the end, and that always comes first. Okay, So did you guys have any problems naming this? This is called a vinyl group. Guys, that's just a common substitute. You should know. So this would be n vinyl and then the rest of the name. Okay, so n vinyl. And then you got your route cool. So let's do common. So common is going to be, um, a Butte beauty Eric Acid. So instead of beauty, Rick acid, it will be if you trim, I'd beauty remind I'm sorry if you tear mind. Okay? And we know that the substance we're gonna be named using Greek symbols. So pretty much I'm actually gonna move this over because I drew it too far out. I want to move it back in so I can have a space for everything else. The end vinyl doesn't change, guys, so and vinyl stays the same. But now I'm gonna have all these substitutes with Greek symbols and the Greek symbols. I'm gonna be using our Alfa and beta. Okay, So in alphabetical order, it would be beta hydroxy and then Alfa Beta dime Ethel Beauty remind. Alright, guys. Awesome. So not so bad. Let's move onto the next problem.
3
example
Draw the amide
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Okay, so for this 1 may be the most challenging thing was that you might have forgotten what a Benzel group looks like. Remember, that's not a fennel. Fennel is a benzene ring directly attached. You're like, Oh, shoot, I forgot. So Benzel is a fennel with an extra ch two. Let's draw our amad. So am it. Looks like this. It's for general formula right now, in terms of the roots, a seed of mine, that's just a two carbon chain. So this is drawn correctly. I'm just gonna keep it like this ch three. That's my seat of mine. Now I just need the n alcohol groups, and that's gonna be to Benzel groups. That's gonna be one to like this and one to like this. Awesome. And that's my compound. Now, guys, one thing that actually didn't come up in any of these examples. But I wanna make sure you know, it is just what happened to you have two different substitue INTs. Then you put those in alphabetical order on the end. So if I had, let's say an ethyl on, um, Ethel, then that would turn into en Ethel and Metal. Okay, You would not put end common end ethyl methyl. That's wrong. You have to put the end before every substitution. Other than that, you should be good to go. Alright, guys, let's move on to the next topic.
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