Alkanes naming question
Posted: Fri Mar 10, 2017 7:59 pm
How do we deal with naming an alkane when there is a substituent attached to a substituent?
Re: Alkanes naming question [ENDORSED]
Posted: 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!