onium compounds

Preferred Label : onium compounds;

IUPAC definition : derivatives formed by substitution of the above parent ions by groups having two or three free valencies on the same atom. such derivatives are, where possible, designated by a specific class name. e.g. r c 3 o1 hydrocarbylidyne oxonium ions, r2 c 2 n1 h2 x-1 iminium compounds, r c 3 n h1 nitrilium ions.; derivatives formed by substitution of the above parent ions by univalent groups. the number of substituted hydrogen atoms is, especially in the case of hydrocarbyl substituents, indicated by the adjectives primary, secondary, tertiary or quaternary. e.g. cl 2 f 1 dichlorofluoronium, c h3 2 s1 h dimethylsulfonium (a secondary sulfonium ion), cl c h3 3 p1 chlorotrimethylphosphonium, c h3 c h2 4 n1 tetraethylammonium (a quaternary ammonium ion). arsonium compounds halonium ions oxonium ions phosphonium compounds quaternary ammonium compounds stibonium compounds sulfonium compounds; cations (with their counter-ions) derived by addition of a hydron to a mononuclear parent hydride of the nitrogen, chalcogen and halogen families. h 4 n 1 ammonium h 3 o 1 oxonium h 2 f 1 fluoronium h 4 p 1 phosphonium h 3 s 1 sulfonium h 2 cl 1 chloronium h 4 as 1 arsonium h 3 se 1 selenonium h 2 br 1 bromonium h 4 sb 1 stibonium h 3 te 1 telluronium h 2 i 1 iodonium h 4 bi 1 bismuthonium;

Details

Origin ID

O04291;

Currated CISMeF NLP mapping
- onium compounds [MeSH Descriptor]
- onium compounds [MeSH concept]
See also
- aminium ions [IUPAC Term]
- ammonium compounds [IUPAC Term]
- arsonium compounds [IUPAC Term]
- betaines [IUPAC Term]
- cation [IUPAC Term]
- counter-ions [IUPAC Term]
- halonium ions [IUPAC Term]
- hydrocarbyl groups [IUPAC Term]
- hydron [IUPAC Term]
- iminium compounds [IUPAC Term]
- lyonium ion [IUPAC Term]
- nitrilium ions [IUPAC Term]
- oxonium ions [IUPAC Term]
- parent hydride [IUPAC Term]
- phase-transfer catalysis [IUPAC Term]
- phosphonium compounds [IUPAC Term]
- quaternary ammonium compounds [IUPAC Term]
- stibonium compounds [IUPAC Term]
- sulfonium compounds [IUPAC Term]

Keyword's position in hierarchy(ies) :

You can consult :

recommendations
documents concerning education
documents for patients

derivatives formed by substitution of the above parent ions by groups having two or three free valencies on the same atom. such derivatives are, where possible, designated by a specific class name. e.g. r c 3 o1 hydrocarbylidyne oxonium ions, r2 c 2 n1 h2 x-1 iminium compounds, r c 3 n h1 nitrilium ions.
derivatives formed by substitution of the above parent ions by univalent groups. the number of substituted hydrogen atoms is, especially in the case of hydrocarbyl substituents, indicated by the adjectives primary, secondary, tertiary or quaternary. e.g. cl 2 f 1 dichlorofluoronium, c h3 2 s1 h dimethylsulfonium (a secondary sulfonium ion), cl c h3 3 p1 chlorotrimethylphosphonium, c h3 c h2 4 n1 tetraethylammonium (a quaternary ammonium ion). arsonium compounds halonium ions oxonium ions phosphonium compounds quaternary ammonium compounds stibonium compounds sulfonium compounds
cations (with their counter-ions) derived by addition of a hydron to a mononuclear parent hydride of the nitrogen, chalcogen and halogen families. h 4 n 1 ammonium h 3 o 1 oxonium h 2 f 1 fluoronium h 4 p 1 phosphonium h 3 s 1 sulfonium h 2 cl 1 chloronium h 4 as 1 arsonium h 3 se 1 selenonium h 2 br 1 bromonium h 4 sb 1 stibonium h 3 te 1 telluronium h 2 i 1 iodonium h 4 bi 1 bismuthonium