Naming Organic Compounds

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Naming Organic Compounds

Postby Justin_Ching_3I » Sun Mar 05, 2017 6:05 pm

Would adding up the numbers in the organic compound name and then finding which one has the lower number work in seeing which one is the correct way to name a compound?
4-ethyl-2, 2-dimethyl-hexane (4+2=6)
3-ethyl-5,5-dimethyl-hexane (3+5=8)

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Re: Naming Organic Compounds

Postby Isaac_Gorgy_2K » Sun Mar 05, 2017 6:30 pm

Yes, I believe it does, but it is much easier to just look at the smaller number. In this case, it will be 2, so the first one (4-ethyl-2, 2-dimethyl-hexane) is the correct way of naming.

Ranica Hortelano 2D
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Re: Naming Organic Compounds

Postby Ranica Hortelano 2D » Sun Mar 05, 2017 6:35 pm

I think this could work because essentially you want to yield the lowest number and typically you would choose 4-ethyl-2, 2-dimethyl-hexane.

Zulfiqar Lokhandwala 1H
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Re: Naming Organic Compounds

Postby Zulfiqar Lokhandwala 1H » Sun Mar 05, 2017 6:51 pm

This actually doesn't work, if we read the textbook it specifically brings up that thought. On page 8 it says "2,7,8-trimethyldecane is the correct name even though the sum of the numbers (2+7+8=17) is higher than the sum, 16, obtained from the incorrect name 3,4,9-trimethyldecane."
So we aren't supposed to add the numbers to determine which IUPAC naming we use

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Re: Naming Organic Compounds

Postby Chem_Mod » Mon Mar 06, 2017 1:46 pm

This method does not generally work so it's better to just look at the numbers separately.

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