Photochemical aromatic substitution

{
  "id": "MLC-T-CHM-008816",
  "term": "Photochemical aromatic substitution",
  "field": "Chemistry",
  "definition": "A type of substitution reaction on an aromatic ring that is initiated or promoted by light. Unlike thermal aromatic substitution, which often involves electrophilic or nucleophilic mechanisms, photochemical variants can proceed through radical or excited-state pathways. These reactions can lead to different regioselectivity compared to their thermal counterparts.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "aromatic substitution photochemical electrophile-olefin combination",
    "photochemical nucleophile-olefin combination - aromatic substitution",
    "photostimulated unimolecular radical nucleophilic substitution",
    "photosubstitution"
  ],
  "references": [
    "PAC, 2007, 79, 293. 'Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006)' on page 384 (https://doi.org/10.1351/pac200779030293)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/photochemical-aromatic-substitution/"
}