Combining IUPAC with Common Name iso, neo, sec...

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JuliaPark2H
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Joined: Fri Sep 25, 2015 3:00 am

Combining IUPAC with Common Name iso, neo, sec...

Postby JuliaPark2H » Wed Mar 02, 2016 5:44 pm

I have trouble identifying the correct ways to include the common names into the IUPAC names.
One specific problem I ran into was with a tert-butyl substituent (the one that looks like a plus sign). In section 1.1, it stated that a (CH3)3C- bond has the title neo, so would neobutyl be the same thing as tert-butyl?
Does that mean a primary and quaternary carbon atom is impossible to find as a substituent?

Chem_Mod
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Re: Combining IUPAC with Common Name iso, neo, sec...

Postby Chem_Mod » Thu Mar 03, 2016 12:29 am

Using the definition of "neo", something called neobutyl would be EXACTLY the same as tert-butyl. Officially, it is called tert-butyl and therefore neobutyl does not exist.

Here is a list of substituents that DO exist:

3 carbons: propyl, isopropyl
4 carbons: butyl, isobutyl, sec-butyl, tert-butyl
5 carbons: pentyl, isopentyl, neopentyl, sec-pentyl, tert-pentyl, sec-isopentyl (you do not have to memorize these, but try to draw them all out as an exercise, based on the definitions of iso, neo, sec, and tert !)

Rachel Russell 4B
Posts: 12
Joined: Fri Sep 25, 2015 3:00 am

Re: Combining IUPAC with Common Name iso, neo, sec...

Postby Rachel Russell 4B » Sun Mar 06, 2016 11:46 pm

Is there a reason that tert is used instead of neo?


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