Alkanes naming question  [ENDORSED]

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Steven_Liu_3H
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Joined: Wed Sep 21, 2016 2:55 pm

Alkanes naming question

Postby Steven_Liu_3H » Fri Mar 10, 2017 7:59 pm

How do we deal with naming an alkane when there is a substituent attached to a substituent?

stephanieyang_3F
Posts: 62
Joined: Wed Sep 21, 2016 2:55 pm

Re: Alkanes naming question  [ENDORSED]

Postby stephanieyang_3F » Sat Mar 11, 2017 8:24 am

For every substituent, treat it like it's the chain alone first, and then at the end remove the ending and add -yl. To put this in perspective, if you were to have a substituent that had a 2 carbon chain (ethane) and a methyl group attatched to its end, you'd have "1-methyl-ethane", right? Then if you were to use that chain as a substituent, you'd then remove the ending and add -yl, so it's "1-methyl-ethyl". (Also keep in mind that when it becomes a substituent one H is removed). The reason why we use common naming is to avoid these weird substituent on substituent situations, almost like a nickname for that particular chain, which in this case is "isopropyl". Hope this makes sense!


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