Write the IUPAC name for each of the following:
d.

Question

Write the IUPAC name for each of the following:

d.

Accepted Answer

All right. Hello everyone. So for this question, let's go ahead and choose the correct Iupac name for the molecule shown below. Option A says five methyl, four nitro Benzal. Option B says five methyl, four nitro Benzer. Now, option C says three methyl, four nitro benz aldehyde. An ee says three methyl four nitro bund. Now, so recall that when it comes to an Iupac name, our first step should always be to locate the parrot chain or in other words, the longest continuous carbon chain that contains our primary functional group. And on the topic of the primary functional group. Notice here how attached to the ring in the center of this compound is a car bal or carbon double bonded to oxygen and the carbon carbon is attached to a hydrogen. This if you recall is an aldehyde functional group. And so the parent chain of this compound is going to be the longest continuous carbon chain that contains the aldehyde functional group. And on the topic of the parent chain, we can see that it is a benzene ring in the center attaching to the aldehyde itself. So in this case, we have benzene attaching to an aldehyde, which if you recall has an Iupac name of Benz aldehyde. So here our Iupac name should end in Benzal Hyde because that is the parent name of this compound. So with this in mind, we can focus on the second step which include naming and identifying other substituents present in this molecule. Now, because the aldehyde is included as part of the parent chain, right? It's the highest priority functional group. Then the carbon atom on the benzene ring connecting to the aldehyde should be labeled number one. So in this case, my next step is to number the rest of the carbons in the benzene ring itself. Now I can do so either clockwise or counterclockwise. But recall that the main idea is to always ensure that your substituents have the smallest number you can give them to indicate their position. So considering the fact that I have one substituent closer to the aldehyde carbon going counterclockwise, I'm going to go ahead and continue numbering in that direction. So now we can talk about substituents. In this case, it just so happens that we have two, we have one substituent on carbon three of the benzene ring and another on carbon four. So when it comes to the substituent on carbon, number three, recall that this is actually going to be a methyl group because in the context of a line structure like the one we are given carbon atoms are implied by using corners and open ends of line structures. So the fact that the substituent on carbon three here is merely an open end. Then that is characteristic of a one carbon substituent, otherwise known as a methyl group. And on the other hand, attached to carbon four of the benzene ring is an no two group, which is referred to as a nitro group. So when it comes to the names of substituents, recall that position numbers have to be placed before the name of the substituent itself. So that's going to be three dash methyl and four dash nitro using dashes to separate numbers from letters. So now our last step is to go ahead and put all of our information together. Recall that substituents are listed in alphabetical order before the name of the parent chain. So because the M in Methyl goes before the N in Nitro, I'm going to be writing my meal group first, right? So it's three dash metal dash four dash nitro, followed by the parent chain which is Benzal Hyde. And so when I put everything together, there are no spaces in between the letters themselves. And once again, I'm using dashes or hyphens to separate numbers from letters. If I happen to have numbers right next to each other, I would use a comma to separate those and there you have it. This gives me an Iupac name of three methyl, four Nitro, Benz Aldehyde which matches option C in the multiple choice. So with that being said, thank you so very much for watching. And I hope you found this helpful.

Write the IUPAC name for each of the following:
d. <IMAGE>

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Key Concepts

IUPAC Nomenclature

Functional Groups

Structural Representation