Nomenclature of OH derivatives
Nomenclature of alcohols
Open chained hydroxy derivatives are called alcohols.
- Common name : Alkyl alcohol
- IUPAC name : Alkanol
Some compounds with there common names as well as IUPAC names are given below :
- Common name : Methyl alcohol
- IUPAC name : Methan-1-ol
- Common name : n-Butyl alcohol
- IUPAC name : Butan-1-ol
- Common name : sec.-Butyl alcohol
- IUPAC name : Butan-2-ol
- Common name : Isobutyl alcohol
- IUPAC name : 2-Methylpropan-1-ol
- Common name : tert.-Butyl alcohol
- IUPAC name : 2-Methylpropan-2-ol
Some other examples of alcohols
3-Bromo-2-chloropropan-1-ol
But-2-ene-1,4-diol
Prop-2-en-1-ol
Pentane-2,3,4-triol
Nomenclature of phenols
Phenols are the hydroxy derivatives of aromatic hydrocarbons.
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.
3-Chlorophenol
However, poly-hydroxy phenols (containing two or more -OH groups) are named as hydroxy derivatives of benzene.
Benzene-1,2-diol
Benzene-1,3,5-triol
Important point
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.