Evidence map›Paper›PMID 25803470›Full record

ArticleNature chemistry2015

Inducing and quantifying forbidden reactivity with single-molecule polymer mechanochemistry.

Junpeng Wang, Tatiana B Kouznetsova, Zhenbin Niu, Mitchell T Ong, Hope M Klukovich, Arnold L Rheingold, Todd J Martinez, Stephen L Craig

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Article in Nature chemistry, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 40 papers.

0numbers the graph read from it
0cells of the map it votes in
40citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

40 citing papers in PubMed.

  1. Article
  2. Review
  3. Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. Mechanochemistry: Fundamental Principles and Applications.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2025
    Review
  10. Article
  11. Article
  12. Article
  13. Stereochemical Impacts on Acyclic Mechanochemical Carbon-Carbon Bond Activation.Angewandte Chemie (International ed. in English) · 2025
    Article
  14. Article
  15. Frontiers in chemistry · 2024
    Review
  16. Furan Release via Force-Promoted Retro-[4+2][3+2] Cycloaddition.Journal of the American Chemical Society · 2023
    Article
  17. Review
  18. Article
  19. Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors.

Junpeng WangDepartment of Chemistry, Duke University, Durham, North Carolina 27708, USA.
Tatiana B KouznetsovaDepartment of Chemistry, Duke University, Durham, North Carolina 27708, USA.
Zhenbin NiuDepartment of Chemistry, Duke University, Durham, North Carolina 27708, USA.
Mitchell T OngMaterials Science Division, Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
Hope M KlukovichDepartment of Chemistry, Duke University, Durham, North Carolina 27708, USA.
Arnold L RheingoldDepartment of Chemistry, University of California, La Jolla, California 92093, USA.
Todd J MartinezDepartment of Chemistry, Stanford University, Stanford, California 94305, USA.
Stephen L CraigDepartment of Chemistry, Duke University, Durham, North Carolina 27708, USA.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Forbidden reactions, such as those that violate orbital symmetry effects as captured in the Woodward-Hoffmann rules, remain an ongoing challenge for experimental characterization, because when the competing allowed pathway is available the reactions are intrinsically difficult to trigger. Recent developments in covalent mechanochemistry have opened the door to activating otherwise inaccessible reactions. Here we report single-molecule force spectroscopy studies of three mechanically induced reactions along both their symmetry-allowed and symmetry-forbidden pathways, which enables us to quantify just how 'forbidden' each reaction is. To induce reactions on the ~0.1 s timescale of the experiments, the forbidden ring-opening reactions of benzocyclobutene, gem-difluorocyclopropane and gem-dichlorocyclopropane require approximately 130 pN less, 560 pN more and 1,000 pN more force, respectively, than their corresponding allowed analogues. The results provide the first experimental benchmarks for mechanically induced forbidden reactions, and in some cases suggest revisions to prior computational predictions.

Identifiers

PMID25803470

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.