IUPAC Nomenclature Find the longest carbon chain containing the carbon with the-OH group. Drop the -e from the alkane name,add -ol. Number the chain giving the-OH group the lowest number possible. Number and name all substituents and write them in alphabetical order. Chapter 10 5 Chapter 10 5 IUPAC Nomenclature • Find the longest carbon chain containing the carbon with the —OH group. • Drop the -e from the alkane name, add -ol. • Number the chain giving the —OH group the lowest number possible. • Number and name all substituents and write them in alphabetical order