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IUPAC name

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ve_90:
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".

Hunter2:
The first one is correct. Smaller number first and alphabetical  order. But also Isopropyl is still valid.

ve_90:
Thank you very much. For the same reasons 4-(1-chloroethyl)-2-iodo-3-methyloctane is correct for the following compound?

Hunter2:
Yes, I would say so

rolnor:
Isopropyl is not correct I think, isopropanol should be 2-propanol

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