10. 1 Naming Carboxylic Acids and derivatives If derived from open-chain alkanes replace the terminal -e of the alkane name with-oic acid The carboxyl carbon atom is C(1) CH. 0 CHCH. CH, O CHa CHOCOH CHgCHCH CH,COH HOCCHCHCH2CHCHCHCOH Propanoic acid 4-Methylpentanoic acid 3-Ethyl-6-methyloctanedioic acid @2004 Thomson/Brooks Cole10.1 Naming Carboxylic Acids and Derivatives • If derived from open-chain alkanes, replace the terminal -e of the alkane name with -oic acid • The carboxyl carbon atom is C(1)