Protonated molecule: Difference between revisions

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{{DefName|An ion formed by interaction of a neutral molecule with a proton, and represented by the symbolism [M + H]<sup>+</sup>. The  term 'protonated molecular ion' is not recommended as it suggests a different species formed by the association of a proton with a molecular ion. Likewise, the ambigous terms 'quasi-molecular ion' or 'pseudo-molecular ion' should be avoided.}}
{{Final
|acronym=
|def=Deprecated: [[protonated molecular ion]], [[pseudo-molecular ion]], [[quasi-molecular ion]].


== Related Terms ==
[[Adduct ion]], represented by [M + H]<sup>+</sup>, formed by the interaction of a molecule with a [[proton]]
([[hydron]]).
:Note 1: [[Multiply protonated molecule]]s are represented by [M + nH]<sup>n+</sup> where n is the number of protons.
:Note 3: Pseudo-molecular ion and quasi-molecular ion are deprecated; a specific term such as protonated molecule, or a chemical description such as [M + H]<sup>+</sup> should be used.
|rel=[[adduct ion]]
|ref={{obgb}}


[[Molecular Ion]]
M. Bursey. Mass Spectrom. Rev. 10, 1 (1991). (http://dx.doi.org/10.1002/mas.1280100102 )
}}


[[Cationized Molecule]]
{{orange|
An ion formed by interaction of a molecule with a proton abstracted from an ion, as
often happens in chemical ionization according to the reaction M + XH+ ? MH+ +
X. The symbolism (M+H)+  may also be used. The widely used term 'protonated
molecular ion' is not recommended as it suggests an association product of a proton
with a molecular ion.
}}
 
<!-- Gold Book -->
{{gold|
http://goldbook.iupac.org/P04908.html
 
An ion formed by interaction of a molecule with a proton abstracted from an ion, as often occurs in [[chemical ionization]] according to the reaction: 
 
M + XH<sup>+</sup> ? MH<sup>+</sup> + X
 
. The symbolism [M + H]+ may also be used to represent the protonated molecule. The widely used term '[[protonated molecular ion]]' to describe the MH+ ion is not recommended, since it suggests an associated product of a proton with a molecular ion.
 
'''Source''':
 
PAC, 1991, 63, 1541 ([[Recommendations for nomenclature and symbolism for mass spectroscopy]] (including an appendix of terms used in vacuum technology). (Recommendations 1991)) on page 1550
}}
 
== See also ==
*[[Molecular ion]]
*[[Cationized Molecule]]


[[Category:Ions]]
[[Category:Ions]]
{{DEFAULTSORT:Protonated Molecule}}
[[Category:Orange Book term]]

Revision as of 14:46, 31 March 2014