Difference between revisions of "Onium ion"

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{{DefName|
 
{{DefName|
A positively charged higher-valency ion of the nonmetallic elements. Examples are the methonium ion CH<sub>5</sub><sup>+</sup>, the hydrogenonium ion H<sub>3</sub><sup>+</sup> and and the hydronium ion H<sub>3</sub>O<sup>+</sup>.  Other examples are the carbonium, oxonium, sulfonium, nitronium, diazonium, phosphonium, and halonium ions. Onium ions are not limited to monopositive ions; multiply-charged onium ions exist such as the gitonic (proximal) oxonium dication H<sub>4</sub>O<sup>2+</sup> and the [[distonic]] oxonium dication H<sub>2</sub>O<sup>+</sup>-CH<sub>2</sub>-CH<sub>2</sub>-OH<sub>2</sub><sup>+</sup>. }}   
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A positively charged hypervalent ion of the nonmetallic elements. Examples are the methonium ion CH<sub>5</sub><sup>+</sup>, the hydrogenonium ion H<sub>3</sub><sup>+</sup> and and the hydronium ion H<sub>3</sub>O<sup>+</sup>.  Other examples are the carbonium, oxonium, sulfonium, nitronium, diazonium, phosphonium, and halonium ions. Onium ions are not limited to monopositive ions; multiply-charged onium ions exist such as the gitonic (proximal) oxonium dication H<sub>4</sub>O<sup>2+</sup> and the [[distonic]] oxonium dication H<sub>2</sub>O<sup>+</sup>-CH<sub>2</sub>-CH<sub>2</sub>-OH<sub>2</sub><sup>+</sup>. }}   
  
 
== Related Terms ==
 
== Related Terms ==

Revision as of 18:29, 25 December 2005

DRAFT DEFINITION
Onium ion

A positively charged hypervalent ion of the nonmetallic elements. Examples are the methonium ion CH5+, the hydrogenonium ion H3+ and and the hydronium ion H3O+. Other examples are the carbonium, oxonium, sulfonium, nitronium, diazonium, phosphonium, and halonium ions. Onium ions are not limited to monopositive ions; multiply-charged onium ions exist such as the gitonic (proximal) oxonium dication H4O2+ and the distonic oxonium dication H2O+-CH2-CH2-OH2+.

Considered between 2004 and 2006 but not included in the 2006 PAC submission
This is an unofficial draft definition presented for information and comment.

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