One-bond-flip

{
  "id": "MLC-T-CHM-008233",
  "term": "One-bond-flip",
  "field": "Chemistry",
  "definition": "A mechanism of E/Z photoisomerization in which a single C=C double bond of a conjugated system twists through about 180 degrees in the excited state before relaxing to the ground state as the other geometric isomer. It is the ordinary E/Z photoisomerization, in contrast to the bicycle-pedal and hula-twist mechanisms, in which two bonds or neighbouring units move together.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "photoisomerization",
    "bicycle-pedal mechanism",
    "hula-twist mechanism"
  ],
  "references": [
    "PAC, 2007, 79, 293. 'Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006)' on page 377 (https://doi.org/10.1351/pac200779030293)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/one-bond-flip/"
}