Nomenclature of the Ethers. IUPAC nomenclature of ethers

The official nomenclature of the ethers, according to IUPAC, can be done in two ways. See each one:

1st way:

Examples:

CH_{3 —} O — CH₂ — CH₃→ metoxyetanO

CH₃ — CH₂ — O — CH₂ —CH₃→ etoxyetanO

CH₃ — CH₂ — O — CH₂— CH₂ —CH₃→etoxypropanO

CH₃ — O — CH₂— CH═CH —CH₃→ metoxybutenO

CH₃ — CH₂ — CH₂ — O — CH₂— CH₂ — CH₂ — CH₂ — CH₃→propoxypentanO

If they are ethers of closed chains, the nomenclature will be different:

Examples:

2nd way:

The two groups linked to oxygen are considered as substituents, being indicated in order of complexity with the suffix ich, that is, it follows the following rule:

ether + 1st group + 2nd group + ich

These groups should appear and

Examples:

CH₃— O —CH₂ —CH₃→ ether ethylich and methylich

CH₃ —CH₂—O —CH₂ —CH₃→etherdiethylich

CH₃ —CH₂—O —CH₂—CH₂ —CH₃→etherethylich and propileich

CH₃ —CH₂ —CH₂—O —CH₂—CH₂ —CH₂ —CH₂ —CH₃→etherpropileich and pentylich

In the case of cyclic compounds, they are called epoxides:

By Jennifer Fogaça
Graduated in Chemistry

Source: Brazil School - https://brasilescola.uol.com.br/quimica/nomenclatura-dos-Eteres.htm