Certain chemical reactions occur with zero activation energy

the verdict

SUPPORTED

the evidence backs this

Recorded sources

2 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 certain chemical reactions occur with zero activation energy?

Yes. Chemical reactions with zero or near-zero activation energy are well-documented in specific contexts, such as diffusion-controlled electron transfer and certain barrierless radical recombination steps.

Verdict: SUPPORTED · 2 sources for, 0 against · Last checked 31 Jul 2026

The analysis

The claim that certain chemical reactions occur with zero activation energy is supported by chemical physics literature on diffusion-controlled electron transfer and barrierless potential energy surface steps (e.g., papers 6 and 10), where activation barriers vanish under high electronic coupling or resonance conditions.

Evidence for · 2

Fresh Look at Electron-Transfer Mechanisms via the Donor/Acceptor Bindings in the Critical Encounter Complex

2008

Demonstrates that certain electron-transfer reactions can occur without an activation barrier when resonance stabilization dominates.

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Rosokha, S. V. & Kochi, J. K. (2008). Fresh Look at Electron-Transfer Mechanisms via the Donor/Acceptor Bindings in the Critical Encounter Complex. doi.org. https://doi.org/10.1021/ar700256a

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More for · 1

A Theoretical Study on the Mechanism of Camphor Hydroxylation by Compound I of Cytochrome P450

2003

Shows that the recombination step in cytochrome P450 hydroxylation can occur via virtually barrierless processes.

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Kamachi, T. & Yoshizawa, K. (2003). A Theoretical Study on the Mechanism of Camphor Hydroxylation by Compound I of Cytochrome P450. doi.org. https://doi.org/10.1021/ja0208862

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Receipt History

first checked31 Jul 2026

judged → SUPPORTED · 9231 Jul 2026

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