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the claim

Nucleophilic aromatic substitutions proceed via a stepwise or concerted mechanism

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.

Nucleophilic aromatic substitutions (S_NAr) can proceed through either a concerted or a stepwise mechanism depending on the substrate structure, nucleophile, and reaction conditions.

The analysis

The retrieved papers examine the mechanisms of nucleophilic aromatic substitution and confirm that they can proceed via concerted or stepwise pathways, or a continuum between them. Papers [3], [4], and [8] explicitly discuss both mechanistic possibilities and how different conditions favor one or the other. Therefore, the claim is fully supported.

Evidence for · 3
Sulfonylation of Five‐Membered Aromatic Heterocycles Compounds through Nucleophilic Aromatic Substitution: Concerted or Stepwise Mechanism?
Recorded source metadata

Sebastián Adolfo Cuesta, Tania Cordova‐Sintjago, José Ramón Mora. Sulfonylation of Five‐Membered Aromatic Heterocycles Compounds through Nucleophilic Aromatic Substitution: Concerted or Stepwise Mechanism?. 2020. https://doi.org/10.1002/slct.202000656

Paper [3] explicitly examines both concerted and stepwise mechanisms for nucleophilic aromatic substitution reactions, noting that different conditions dictate which pathway is followed.

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More for · 2
A mechanistic continuum of nucleophilic aromatic substitution reactions with azole nucleophiles.
Recorded source metadata

Toll HW, Zhang X, Gao T, Dal Poggetto G, Reibarkh M, Lee JJ, Yang KJ, Kwan EE, Turek AK. A mechanistic continuum of nucleophilic aromatic substitution reactions with azole nucleophiles.. 2025. https://doi.org/10.1039/d5sc01856k

Paper [4] discusses how S_NAr reactions can exist on a mechanistic continuum encompassing both stepwise and concerted pathways depending on substrate structure and conditions.

Substituent Effect on the Nucleophilic Aromatic Substitution of Thiophenes With Pyrrolidine: Theoretical Mechanistic and Reactivity Study.
Recorded source metadata

Pouzens JT, Souissi S, Ludwig B, Le Breton G, Ingrosso F, Ayachi S, Hierso JC, Boubaker T, Fleurat-Lessard P. Substituent Effect on the Nucleophilic Aromatic Substitution of Thiophenes With Pyrrolidine: Theoretical Mechanistic and Reactivity Study.. 2025. https://doi.org/10.1002/jcc.70169

Paper [8] details an S_NAr reaction that proceeds via a well-defined stepwise pathway involving a Meisenheimer-type intermediate.

The paper trail · every fact has a biography
first checked01 Aug 2026
judged → SUPPORTED · 7801 Aug 2026
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