Chemistry > General Organic Chemistry > 6.0 Nomenclature of compounds with functional groups named as suffixes

  General Organic Chemistry
    1.0 Introduction
    2.0 Classification of organic compounds
    3.0 Homologous series
    4.0 Nomenclature of hydrocarbons
    5.0 Nomenclature of compounds containing halogens and nitro groups
    6.0 Nomenclature of compounds with functional groups named as suffixes
    7.0 Nomenclature of aromatic compounds
    8.0 Radicofunctional naming
    9.0 Organic reactions
    10.0 Electrophiles
    11.0 Nucleophiles
    12.0 Breaking and forming of bonds
    13.0 Reaction intermediates
    14.0 Electron displacement effects
    15.0 Inductive effects
    16.0 Hyperconjugation
    17.0 Resonance
    18.0 Mesomeric effect
    19.0 Electromeric effect
    20.0 Inductomeric effect
    21.0 Steric inhibition of resonance
    22.0 Ortho effect

6.1 Ethers and thioethers

In the naming of ethers as alkyloxy derivatives of alkanes, it is general practice to shorten the names of compounds containing four or less carbons to alkoxy derivatives (i.e. omit the syllable "-yl").

Example: methyloxy becomes methoxy, ethyloxy becomes ethoxy but pentyloxy (for $CH_3CH_2CH_2CH_2CH_2O-$) is correct.

An alternative system for naming ethers (or thioethers) is to name the alkyl groups on oxygen (sulfur) and list them in alphabetical order as separate words before the name "ether" (or sulfide).

Examples:

(a).

The name of the compound is diethyl ether or ethoxyethane.


(b).

The name of the compound is isopropyl methyl ether or 2-methoxypropane.


(c).

The name of the compound is ethyl propyl sulfide or 1-ethylthiopropane.


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