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Onium Compounds MeSH Descriptor Data 2021


MeSH Heading
Onium Compounds
Tree Number(s)
D02.675
Unique ID
D009861
RDF Unique Identifier
http://id.nlm.nih.gov/mesh/D009861
Scope Note
Ions with the suffix -onium, indicating cations with coordination number 4 of the type RxA+ which are analogous to QUATERNARY AMMONIUM COMPOUNDS (H4N+). Ions include phosphonium R4P+, oxonium R3O+, sulfonium R3S+, chloronium R2Cl+
Entry Version
ONIUM CPDS
Registry Number
0
Public MeSH Note
68
History Note
68
Date Established
1968/01/01
Date of Entry
1999/01/01
Revision Date
2005/07/01
Onium Compounds Preferred
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