Nomenclature of OH derivatives

Nomenclature of alcohols

Open chained hydroxy derivatives are called alcohols.

Some compounds with there common names as well as IUPAC names are given below :

Nomenclature of alcohols : Methanol
  • Common name : Methyl alcohol
  • IUPAC name : Methan-1-ol
Nomenclature of alcohols : Butan-1-ol
  • Common name : n-Butyl alcohol
  • IUPAC name : Butan-1-ol
Nomenclature of alcohols : Butan-2-ol
  • Common name : sec.-Butyl alcohol
  • IUPAC name : Butan-2-ol
Nomenclature of alcohols : 2-Methylpropan-1-ol
  • Common name : Isobutyl alcohol
  • IUPAC name : 2-Methylpropan-1-ol
Nomenclature of alcohols : 2-Methylpropan-2-ol
  • Common name : tert.-Butyl alcohol
  • IUPAC name : 2-Methylpropan-2-ol

Some other examples of alcohols

Nomenclature of alcohols : 3-Bromo-2-chloropropan-1-ol


Nomenclature of alcohols : But-2-ene-1,4-diol


Nomenclature of alcohols : Prop-2-en-1-ol


Nomenclature of alcohols : Pentane-2,3,4-triol


Nomenclature of phenols

Phenols are the hydroxy derivatives of aromatic hydrocarbons.

Nomenclature of phenols : phenol


We have already discussed in nomenclature of aromatic compounds that all substituted phenols are named as derivatives of phenols. The positional numbers of the substituents are written with respect to -OH group.

Nomenclature of phenols : 3-Chlorophenol


However, poly-hydroxy phenols (containing two or more -OH groups) are named as hydroxy derivatives of benzene.

Nomenclature of phenols : Benzene-1,2-diol


Nomenclature of phenols : Benzene-1,3,5-triol


Important point

Nomenclature of phenols : 2-Hydroxybenzaldehyde


Since the priority of the -CHO group is higher than that of the -OH group, the compound is a derivative of aldehyde and not phenol.