bicycle-pedal mechanism

initialism: BP
synonym: BP mechanism
https://doi.org/10.1351/goldbook.BT07330
Volume-conserving mechanism proposed for the photoisomerization of conjugated double bonds. Two alternating double bonds rotate concertedly with only the two $\ce{CH}$ units turning in and out of the plane of the molecule.
molecule
See also: hula-twist mechanism
Source:
PAC, 2007, 79, 293. (Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006)) on page 308 [Terms] [Paper]
Citation: 'bicycle-pedal mechanism' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.BT07330 RIS BibTex EndNote
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