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Nomenclature of OH derivatives

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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
Nomenclature of alcohols : Butan-1-ol
Nomenclature of alcohols : Butan-2-ol
Nomenclature of alcohols : 2-Methylpropan-1-ol
Nomenclature of alcohols : 2-Methylpropan-2-ol

Some other examples of alcohols

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

3-Bromo-2-chloropropan-1-ol

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

But-2-ene-1,4-diol

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

Prop-2-en-1-ol

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

Pentane-2,3,4-triol

Nomenclature of phenols

Phenols are the hydroxy derivatives of aromatic hydrocarbons.

Nomenclature of phenols : phenol

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

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

Benzene-1,2-diol

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

Benzene-1,3,5-triol

Important point

Nomenclature of phenols : 2-Hydroxybenzaldehyde

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.

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