Q & A: Numbering Substituents in Organic Chemistry

Posted on January 8th, 2013

Question from one of our Twitter followers:

“While naming a complex organic compound, the substituent is ordered in which manner? The numbering.”

 

Answer from one of our StudyOrgo.com Experts:

Find the longest chain of carbons in the molecule and number them starting with the carbon closest to a branch.

Note: If there is a branch at the same point at either end, start numbering at the end closest to the largest branch. If the branches are of equal size at the same point at either end, start numbering at the end where the next branch is closer.

 

For access to our simple step-by step guide to naming in orgo and our exercises on this topic, sign-up for an account then visit Part 5 of our Summary Guide.

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