Mesomeric effect

{
  "id": "MLC-T-CHM-007216",
  "term": "Mesomeric effect",
  "field": "Chemistry",
  "definition": "The electronic effect transmitted through a conjugated system, involving the delocalization of pi electrons or lone pairs. This effect describes the polarization of a molecule due to the presence of substituents that can donate or withdraw electrons through resonance. It is represented by drawing multiple resonance structures for a molecule.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "chemical reaction",
    "delocalization",
    "electromeric effect",
    "electronic effect of substituents: symbols and signs",
    "electronic state",
    "field effect",
    "inductive effect",
    "ionization",
    "molecular entity",
    "substituent atom",
    "transition state"
  ],
  "references": [
    "PAC, 1994, 66, 1077. 'Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)' on page 1139 (https://doi.org/10.1351/pac199466051077)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/mesomeric-effect/"
}