Moderators: Chem_Mod, Chem_Admin

Posts: 9
Joined: Wed Sep 21, 2016 1:58 pm


Postby Taylor_Lam_1E » Sun Mar 19, 2017 9:16 am

When it comes to numbering alkanes, does it matter where you start? Like in question 5C on quiz 3, where it was a cyclobutane with ethyl and methyl substituents, what would be the 1 and what would be the 3?

Posts: 12
Joined: Wed Sep 21, 2016 1:55 pm

Re: Numbering

Postby Cherry_Deng_1K » Sun Mar 19, 2017 9:51 am


It does matter where you start numbering the carbons. In this case, you would want to assign lower numbers alphabetically. Since E comes before M, you would assign the lower number to ethyl and the higher number to methyl. Therefore, the name of the hydrocarbon would be 1-ethyl-3-methyl cyclobutane.

Return to “*Alkanes”

Who is online

Users browsing this forum: No registered users and 1 guest