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Chemistry LibreTexts

Molecular Ion

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In mass spectroscopy, an electron is removed from the sample molecule; the resultant radical cation is called the molecular ion (symbols: M+, M+).

molecularion1.png

The electron the molecule loses to give the molecular ion is usually the highest-energy electron in the molecule.

eg. 1:

molecularion2.png

eg. 2:

molecularion3.png

eg. 3:

molecularion4.png

see also molecular ion peak


This page titled Molecular Ion is shared under a All Rights Reserved (used with permission) license and was authored, remixed, and/or curated by Gamini Gunawardena via source content that was edited to the style and standards of the LibreTexts platform.

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