Naming with Multplie Substituents

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Kaitlin Ross 3E
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Joined: Fri Sep 25, 2015 3:00 am

Naming with Multplie Substituents

Postby Kaitlin Ross 3E » Mon Feb 22, 2016 12:01 pm

On page 96 of the course reader, the name given for the first example is 4-ethyl-2,2-dimethyl-hexane.
Does the 4-ethyl-2 come first because it's in alphabetical order of substituents (since prefixes don't count) or because there's only one substituent attached to the 4th carbon in the chain compared to the two methyl groups attached at the 2nd carbon?

Chem_Mod
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Re: Naming with Multplie Substituents

Postby Chem_Mod » Mon Feb 22, 2016 12:34 pm

It is because of the alphabetical order.

Rachel Lipman
Posts: 45
Joined: Fri Sep 25, 2015 3:00 am

Re: Naming with Multplie Substituents

Postby Rachel Lipman » Wed Feb 24, 2016 10:44 am

Prefixes on the substituents do not affect the order of the substituents in the final compound name. Remember: the substituents are always alphabetical order disregarding their prefixes.


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