Distonic ion: Difference between revisions

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A radical cation or anion in which the charge site and the spin charge (unpaired electron) cannot be both formally located in the same atom or group of atoms, as opposed to the electronic configuration of conventional ions for which both sites can be placed in the same atom. For instance, .CH2-OH2+ is a distonic ion whereas for its conventional isomer, that is, the radical cation of methanol, CH3OH+., the charge and spin sites are formally located at the O atom.  
{{Final
|acronym=
|def=
[[Radical ion]] whose charge and radical sites are neither at the same atom nor in [[wikipedia:Conjugated system|conjugation]] with each other.
:''Note'' 1: For example, •CH<sub>2</sub>-OH<sub>2</sub><sup>+</sup> is a distonic ion, whereas the [[molecular ion]] of methanol, CH<sub>3</sub>OH<sup>+•</sup> is a conventional [[radical cation]].
:''Note 2'': In a valence bond description, &alpha;-distonic ions have the charge and radical sites on adjacent atoms, &beta;-distonic ions are separated by one atom, &gamma;-distonic ions by two atoms, and so forth.
|rel=
|ref=T. M. Sack, R. L. Cerny, M. L. Gross. J. Am. Chem. Soc. 107, 4562 (1985). (http://dx.doi.org/10.1021/ja00301a041 )


[[Category:Ions]]
S. Hammerum. Mass Spectrom. Rev. 7, 123 (1988). (http://dx.doi.org/10.1002/mas.1280070202 )


== related term ==
}}


[[Conventional Ion]]
[[Category:Ions]]

Latest revision as of 17:12, 18 March 2021

IUPAC RECOMMENDATIONS 2013
Distonic ion
Radical ion whose charge and radical sites are neither at the same atom nor in conjugation with each other.
Note 1: For example, •CH2-OH2+ is a distonic ion, whereas the molecular ion of methanol, CH3OH+• is a conventional radical cation.
Note 2: In a valence bond description, α-distonic ions have the charge and radical sites on adjacent atoms, β-distonic ions are separated by one atom, γ-distonic ions by two atoms, and so forth.
Related Term(s):
Reference(s):

T. M. Sack, R. L. Cerny, M. L. Gross. J. Am. Chem. Soc. 107, 4562 (1985). (http://dx.doi.org/10.1021/ja00301a041 )

S. Hammerum. Mass Spectrom. Rev. 7, 123 (1988). (http://dx.doi.org/10.1002/mas.1280070202 )

From Definitions of Terms Relating to Mass Spectrometry (IUPAC Recommendations 2013); DOI: 10.1351/PAC-REC-06-04-06 © IUPAC 2013.

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