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Topic: IUPAC name  (Read 1847 times)

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Offline ve_90

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IUPAC name
« on: November 08, 2023, 10:57:55 AM »
What's the correct name of this compound?
A) 3-methyl-6-(1-methylethyl)nonane
B) 6-(1-methylethyl)-3-methylnonane

I think the first one is correct but I'm not so sure because I don't remember the IUPAC rules.
Our teacher always calls this substituent "isopropyl".


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Offline Hunter2

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Re: IUPAC name
« Reply #1 on: November 08, 2023, 11:13:23 AM »
The first one is correct. Smaller number first and alphabetical  order. But also Isopropyl is still valid.
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Offline ve_90

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Re: IUPAC name
« Reply #2 on: November 08, 2023, 01:36:58 PM »
Thank you very much. For the same reasons 4-(1-chloroethyl)-2-iodo-3-methyloctane is correct for the following compound?
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Offline Hunter2

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Re: IUPAC name
« Reply #3 on: November 08, 2023, 01:42:55 PM »
Yes, I would say so
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Offline rolnor

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Re: IUPAC name
« Reply #4 on: November 08, 2023, 05:09:20 PM »
Isopropyl is not correct I think, isopropanol should be 2-propanol
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Offline Aldebaran

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Re: IUPAC name
« Reply #5 on: November 08, 2023, 05:50:42 PM »
Our UK exam boards prefer propan-2-ol
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Offline Hunter2

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Re: IUPAC name
« Reply #6 on: November 08, 2023, 10:57:56 PM »
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Offline rolnor

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Re: IUPAC name
« Reply #7 on: November 09, 2023, 04:17:41 AM »
Valid, not prefered. The deffinition is that its a alkyl chain that is branched, isopropyl is not branched. They accept it because its so common.
« Last Edit: November 09, 2023, 04:55:51 AM by rolnor »
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