Protonated molecule

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An ion formed by interaction of a neutral molecule with a proton, and represented by the symbolism [M + H]+. 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.


Orange Book Entry

Related Terms

Molecular Ion