Carbon Number

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Ann Zhang_1M
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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?

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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.

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