sentence: Organic chemistry has rules for naming compounds with substituent groups.
sentences_after: The substituent group is listed first with a suffix to describe how it is attached to the main carbon chain. When naming hydrocarbons that contain a substituent, position numbers may be used. These number will indicate which carbon atom the substituent is attached to. One case where this information is needed is that of isomers.
concept_name: organic chemistry
headings: Substituent
categories: Organic chemistry Chemical nomenclature