trustmebro.to/r/…
✓ checked
trust me, bro:
here is the receipt.
the claim

Reactions between species with different total electron spin multiplicities are spin-forbidden

the verdict
SUPPORTED
the evidence backs this
Recorded sources
3 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that reactions between species with different total electron spin multiplicities are spin-forbidden?

Yes. Chemical reactions and transitions between species possessing different total electron spin multiplicities are fundamentally spin-forbidden, requiring mechanisms such as spin-orbit coupling or intersystem crossing to proceed.

Verdict: SUPPORTED · 3 sources for, 0 against · Last checked

The analysis

The retrieved literature consistently supports the fundamental premise in quantum chemistry and reaction dynamics that reactions or transitions involving a change in total electron spin multiplicity (e.g., between singlet and triplet states) are spin-forbidden and typically necessitate spin-orbit coupling or intersystem crossing to occur.

Evidence for · 3
Noncollinear Spin-Flip TDDFT for Potential Energy Surface Crossings: Conical Intersections and Spin Crossings.
2025
The paper discusses spin crossings between electronic states with different spin multiplicities, such as singlet and triplet, which require nonadiabatic or spin-orbit coupling.
Get citation
X, Z., T, W., YQ, G., & Y, X. (2025). Noncollinear Spin-Flip TDDFT for Potential Energy Surface Crossings: Conical Intersections and Spin Crossings.. doi.org. https://doi.org/10.1021/acs.jctc.5c01272

See more details
More for · 2
Electron transfer drives hydroxyl radical formation in peroxone reactions.
2026
The study notes that spin-orbit coupling enables spin-forbidden release of triplet oxygen in atom-transfer channels during reactions.
Get citation
Y, W., W, Q., Y, Y., & J, M. (2026). Electron transfer drives hydroxyl radical formation in peroxone reactions.. doi.org. https://doi.org/10.1016/j.ese.2026.100704

Kinetics of Submerged Intersystem Crossings in Strongly Coupled Ion-Molecule Reactions: I<sup>+</sup> + CH<sub>3</sub>X (X = F, Cl, Br, I).
2026
The paper examines reactions between ionic and neutral species where exothermic product channels require an intersystem crossing due to differing spin multiplicities.
Get citation
TWR, L., AA, V., SG, A., & NS, S. (2026). Kinetics of Submerged Intersystem Crossings in Strongly Coupled Ion-Molecule Reactions: I<sup>+</sup> + CH<sub>3</sub>X (X = F, Cl, Br, I).. doi.org. https://doi.org/10.1021/acs.jpca.6c00949

What does the evidence say?

The retrieved literature consistently supports the fundamental premise in quantum chemistry and reaction dynamics that reactions or transitions involving a change in total electron spin multiplicity (e.g., between singlet and triplet states) are spin-forbidden and typically necessitate spin-orbit coupling or intersystem crossing to occur.

also asked as
  • Are reactions between species with different total electron spin multiplicities spin-forbidden?
  • Is it true that reactions involving species with differing total electron spin multiplicities are spin-forbidden?
  • Do reactions between species having different total electron spin multiplicities count as spin-forbidden?
  • Is the claim that reactions between species with different total electron spin multiplicities are spin-forbidden correct?
Receipt History
first checked05 Aug 2026
judged → SUPPORTED · 7905 Aug 2026
Anyone with this link can read the claim and its public receipt, including any personal information in that text. Open permanent receipt.
Check your own claim
Challenge the receipt
Requests are recorded for review. This does not start an automatic check or guarantee a response time.

See the evidence timeline

Citation formatting by citeproc-js (Frank Bennett) and the Citation Style Language project. Source and licenses.

This receipt is an automated verdict against our published method · not an opinion about any author or publication.
Terms · Privacy · How verdicts work