Naming the Substituent on the First Carbon

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Michelle Lin 3M
Posts: 12
Joined: Wed Sep 21, 2016 2:55 pm

Naming the Substituent on the First Carbon

Postby Michelle Lin 3M » Tue Mar 14, 2017 10:34 am

1-ethyl-2-methylcyclopropane

Based on this name, is the 1 at the beginning optional or necessary? Are there specific cases where the 1 is not optional?
I thought the 1 at the beginning was optional, but I was told otherwise.

Hung_Sabrina_3N
Posts: 22
Joined: Fri Jul 22, 2016 3:00 am

Re: Naming the Substituent on the First Carbon

Postby Hung_Sabrina_3N » Tue Mar 14, 2017 10:41 am

Its not optional because in this case you have two substituents and by not labeling it with a 1, it is ambiguous where the ethyl is located.


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