Will look at that and say, oh, well I see an OH, and then I see the rest of the molecule, so isn't that an alcohol? But since this oxygen is Here a carboxylic acid, so we can talk about that. Will say a carboxylic acid is an alcohol. Let's look at some of the common mistakes that students make. So there's an esterįunctional group present in the aspirin molecule. So I'll go ahead and write that in, so that is an ester. That's all of this stuff over here, and then, on the other side of the carbonyl we have another R group. We have an oxygen directlyīonded to a carbonyl, and then for this oxygen, we have the rest of the molecule so So here's a carbon doubleīonded to an oxygen, so let's write this out. We have an oxygen, and that oxygen is directlyīonded to a carbonyl. Oxygen is directly bonded to a carbon double bonded to an oxygen, and then we have the rest of the molecule, so hopefully you recognize this as being a carboxylic acid. Oxygen is directly bonded to a carbonyl, so let's goĪhead and write that out. What about this one up here? We have an OH, and the So this is an arene, so there is an arene functional So what functional groups can we find in aspirin? Well, here is an aromatic ring. ROH is an alcohol, so there's also an alcohol present in this compound. What is this functional group? We have an OH and then we have the rest of the molecule, so we have ROH. Here's another alkene, right, here's another carbon-carbon double bond. Well here is a carbon-carbon double bond, and we know that aĬarbon-carbon double bond is an alkene. That we've talked about in the previous videos. So this molecule on the left is found in perfumes,Īnd let's look for some of the functional groups Identifying functional groups in different compounds.

Aldehyde functional group