Protonated molecule: Difference between revisions
From MS Terms
No edit summary |
No edit summary |
||
(5 intermediate revisions by 2 users not shown) | |||
Line 1: | Line 1: | ||
{{ | {{Final | ||
|acronym= | |||
|def=Deprecated: [[protonated molecular ion]], [[pseudo-molecular ion]], [[quasi-molecular ion]]. | |||
Note 1: | [[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 2: Protonated molecular ion is deprecated; this would correspond to a species carrying two positive charges plus an unpaired electron. | |||
: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}} | |||
M. Bursey. Mass Spectrom. Rev. 10, 1 (1991). (http://dx.doi.org/10.1002/mas.1280100102 ) | |||
}} | }} | ||
{{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| | {{gold| | ||
http://goldbook.iupac.org/P04908.html | 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: | 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 | 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. | . 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''': | '''Source''': |