Laporte rule

{
  "id": "MLC-T-CHM-006441",
  "term": "Laporte rule",
  "field": "Chemistry",
  "definition": "A selection rule in spectroscopy that states that electronic transitions between states of the same parity are forbidden. This means that transitions between two g (gerade) states or two u (ungerade) states are forbidden, while g to u or u to g transitions are allowed. It applies to centrosymmetric molecules and atoms.",
  "subject": "Organic and Biomolecular Chemistry",
  "references": [
    "PAC, 1996, 68, 2223. 'Glossary of terms used in photochemistry (IUPAC Recommendations 1996)' on page 2251 (https://doi.org/10.1351/pac199668122223)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/laporte-rule/"
}