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For questions concerning all aspects of pericyclic reactions, their use in synthesis, and the orbital analyses used to describe them.
3
votes
How fast is the interconversion triplet → singlet in organic molecules?
It depends on the organic molecule.
When spin-orbit coupling facilitates intersystem crossing, it can be fast: 100 femtoseconds for nitronapthalene (viz. Chem. Eur. J. 2018, 24, 5379 – 5387).
The Wi …