Molecular ion: Difference between revisions
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== | == Orange Book entry == | ||
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An ion formed by the removal from (positive ions) or addition to (negative ions) a molecule of one or more electrons without fragmentation of the molecular structure. The mass of this ion corresponds to the sum of the masses of the most abundant naturally occurring isotopes of the various atoms that make up the molecule, with a correction for the masses of the electrons lost or gain. | An ion formed by the removal from (positive ions) or addition to (negative ions) a molecule of one or more electrons without fragmentation of the molecular structure. The mass of this ion corresponds to the sum of the masses of the most abundant naturally occurring isotopes of the various atoms that make up the molecule, with a correction for the masses of the electrons lost or gain. | ||
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== | == Gold Book Entry == | ||
[http://www.nicmila.org/Gold/Output/M03988.xhtml molecular ion] | [http://www.nicmila.org/Gold/Output/M03988.xhtml molecular ion] | ||
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[[Category:Ions]] | [[Category:Ions]] | ||
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Revision as of 12:44, 12 July 2009
Obsolete Template
Orange Book entry
Orange Book
| ORANGE BOOK DEFINITION
IUPAC. Analytical Division. Compendium of Analytical Nomenclature (the Orange Book). Definitive Rules, 1979 (see also Orange Book 2023) |
| Molecular ion |
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An ion formed by the removal from (positive ions) or addition to (negative ions) a molecule of one or more electrons without fragmentation of the molecular structure. The mass of this ion corresponds to the sum of the masses of the most abundant naturally occurring isotopes of the various atoms that make up the molecule, with a correction for the masses of the electrons lost or gain. |
| IUPAC 1997 Orange Book Chapter 12 |
| Index of Orange Book Terms |
Gold Book Entry
An ion formed by the removal from (positive ions) or addition to (negative ions) a molecule of one or more electrons without fragmentation of the molecular structure. The mass of this ion corresponds to the sum of the masses of the most abundant naturally occuring isotopes of the various atoms that make up the molecule (with a correction for the masses of the electron(s) lost or gained). For example, the mass of the molecular ion of ethyl bromide C2H5 79Br will be plus 51.0078246 plus 78.91839 minus the mass of the electron (me). This is equal to 107.95751 u - me, being the unified atomic mass unit based on the standard that the mass of the isotope 12C = 12u exactly.
