Evidence map›Paper›PMID 42257369›Full record

ArticleChemistryOpen2026

Direct Evidence for a Carbon-Carbon One-Electron σ-Bond, or a Weak Carbon-Carbon Interaction?

Costantino Zazza, Felice Grandinetti, Nico Sanna, Stefano Borocci, Henry S Rzepa

Abstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in ChemistryOpen, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing 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

1 citing paper in PubMed.

  1. 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

5 authors.

Costantino ZazzaDepartment for Innovation in Biological, Agro-food and Forest systems, Università della Tuscia (DIBAF), Viterbo, Italy.ORCID https://orcid.org/0000-0002-9050-1874
Felice GrandinettiDepartment for Innovation in Biological, Agro-food and Forest systems, Università della Tuscia (DIBAF), Viterbo, Italy.ORCID https://orcid.org/0000-0001-7217-9490
Nico SannaDepartment for Innovation in Biological, Agro-food and Forest systems, Università della Tuscia (DIBAF), Viterbo, Italy.
Stefano BorocciDepartment for Innovation in Biological, Agro-food and Forest systems, Università della Tuscia (DIBAF), Viterbo, Italy.
Henry S RzepaDepartment of Chemistry, Imperial College London, London, UK.ORCID https://orcid.org/0000-0002-8635-8390

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Shimajiri et al. (Nature, 2024, 634, 347-351) reported for the first time on direct evidence for a carbon-carbon one-electron σ bond in a recently synthesized stable radical cation. Single-crystal X-ray diffraction analysis, electron density maps, and RAM spectroscopy provided analytical results supporting the derived picture. However, the theoretical counterpart at the density functional theory level tends to support a different viewpoint, namely two sp

Indexed as

chemical bondingcomputational methodsdensity functional theoryquantum theory of atoms in moleculesRaman spectroscopy

Identifiers

PMID42257369
PMCPMC13244567

What OpenQuestion holds

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Registered trials

None linked

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.