Write the IUPAC name for each of the following alcohols and phenols: (12.1)
a.

Question

Write the IUPAC name for each of the following alcohols and phenols: (12.1)

a.

Accepted Answer

Hi, everybody. Our next problem says, determine the Iupac name for this structure. And we have a benzene ring with an alcohol group and an ayl group adjacent to each other. And our answer choices are a O ethyl, Pinol, BM Ethyol, CP ethyl, Pinol or D two ethyl, one phenol. So let's think about first of all, the base compound of this structure and we have a benzene ring but recall that there are several different names for benzene rings with various important substituents. In this case, we have a benzene ring with an alcohol group attached. And when we have that arrangement, that equals a phenol as the name of the base compound. When we have a phenol, our, our oh group is automatically considered carbon one, then we have a second substituent, we have an apple group. So that two carbon chain attached to the carbon adjacent two carbon one where the phenol the, where the alcohol group is. So we have a dye substituted benzene ring. So even though the alcohol group is sort of wrapped up in the compound base name phenol, we do have two substances on a benzene ring. So then we can use the naming method we see in choices A B and C that Ortho meta pera naming. So we have the Ortho or O we can recall when the two substituents are adjacent, then you have meta or M which you can remember by it being in the middle when the two substituents are two carbons apart. So you always kind of name it by if you have the first or or kind of see those relationships. If you have the first substituents on the top, the meta arrangement would have the next substituent on carbons two carbons away. So we would number it 123, 456 going around. So the Ortho or adjacent would be carbons two and six. The meta would then be carbons three and five. And finally, pera or P would then be if the second substituent is 100 80 degrees away. And so it's on carbon four. Now recall, it's just die substituted. So when I say that Ortho is on carbons two and six, I should actually say on carbons two or 63 or five. So keep that in mind. So our ethyl group is adjacent. So it's going to be Ortho. So choice A O Aino, when we look at our other choices, choice BM Ethyol would only be if the ethyl group were on carbons three or five. So that's not correct. Choice. CP ethyl phenol would be if the ethyl group were on C four, that's not correct. And choice D two ethyl one phenol. Well, it does describe correctly where the alcohol and ethyl groups are, but this is not I UAC naming and you could see it makes it longer than the actual name of O ethyl phenol. And it gives you information. You don't need, you don't need to know that the alcohol groups on carbon one, it's automatically assumed in the name phenol. So choice d not correct. Iupac naming conventions. So once again, the IAC name for the structure given is Choice A O Ethyol. See you in the next video.

Write the IUPAC name for each of the following alcohols and phenols: (12.1)
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Key Concepts

IUPAC Nomenclature

Functional Groups

Structural Isomerism