Carbon Number

Moderators: Chem_Mod, Chem_Admin

Ann Zhang_1M
Posts: 25
Joined: Wed Sep 21, 2016 2:59 pm

Carbon Number

Postby Ann Zhang_1M » Fri Mar 17, 2017 11:25 pm

When naming cycloalkanes with substituents, how do we number the carbon atoms??
After we start with the functional group occupying the #1 carbon or numbering the carbon atoms by following the alphabetical order, do we count the the rest of the atoms clock-wisely or anti-clockwisely? or do we need to make sure that the sum of carbon number are the smallest?

Chem_Mod
Posts: 18400
Joined: Thu Aug 04, 2011 1:53 pm
Has upvoted: 435 times

Re: Carbon Number

Postby Chem_Mod » Sat Mar 18, 2017 12:53 am

You should number according to whichever gives you the lowest numbers for all the substituents. So, the second option you mentioned is correct.


Return to “*Cycloalkanes”

Who is online

Users browsing this forum: No registered users and 1 guest