Even-electron ion

Term · Chemistry · MLC-T-CHM-004133

An ion containing an even number of valence electrons, where all electrons are spin-paired. These ions are formed from neutral molecules by the loss of one electron followed by the loss of a radical, or by the gain of a proton. In mass spectrometry, even-electron ions are generally more stable than their odd-electron counterparts and do not readily fragment by losing a radical.

Table 1. Record
Identifier	MLC-T-CHM-004133
Field	Chemistry
Subject	Physical and Biophysical Chemistry
References	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 1549 (https://doi.org/10.1351/pac199163101541)
See also	Ground state

Record as JSON

{
  "id": "MLC-T-CHM-004133",
  "term": "Even-electron ion",
  "field": "Chemistry",
  "definition": "An ion containing an even number of valence electrons, where all electrons are spin-paired. These ions are formed from neutral molecules by the loss of one electron followed by the loss of a radical, or by the gain of a proton. In mass spectrometry, even-electron ions are generally more stable than their odd-electron counterparts and do not readily fragment by losing a radical.",
  "subject": "Physical and Biophysical Chemistry",
  "see_also": [
    "ground state"
  ],
  "references": [
    "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 1549 (https://doi.org/10.1351/pac199163101541)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/even-electron-ion/"
}

Record 4,381 of 13,676 in Chemistry terminology (MLC-0109). Request the full dataset.