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Record W1999067286 · doi:10.1002/ange.201408211

Über eine fundamentale Änderung der Art der chemischen Bindung durch Isotopensubstitution

2014· article· de· W1999067286 on OpenAlexaff
Donald G. Fleming, J. Manz, Kazuma Sato, Toshiyuki Takayanagi

Bibliographic record

VenueAngewandte Chemie · 2014
Typearticle
Languagede
FieldChemistry
TopicSynthesis and characterization of novel inorganic/organometallic compounds
Canadian institutionsUniversity of British ColumbiaTRIUMF
Fundersnot available
KeywordsChemistryPhysics

Abstract

fetched live from OpenAlex

Abstract Isotopeneffekte können die Bildung und den Bruch chemischer Bindungen im Verlauf chemischer Reaktionen maßgeblich beeinflussen. Hier berichten wir über die Entdeckung einer fundamentalen Änderung der Art der chemischen Bindung durch Isotopensubstitution. Sie beruht auf systematischen quantenchemischen Rechnungen für die Isotopomere BrLBr, wobei “L” ein Wasserstoffisotop bezeichnet. Demnach werden alle vergleichsweise schwereren Isotopomere BrHBr, BrDBr, BrTBr und Br4HBr durch Van‐der‐Waals‐Bindung stabilisiert, wobei 4H das myonische Helium‐Atom bezeichnet, also das schwerste Wasserstoffisotop. Demgegenüber ist das leichteste Isotopomer, BrMuBr, ausschließlich schwingungsgebunden, wobei “Mu” das Myoniumatom bezeichnet; dies ist in Übereinstimmung mit seiner möglichen Beobachtung im jüngsten Experiment zur Mu+Br2‐Reaktion. Demzufolge wird BrMuBr am Sattelpunkt der Potentialenergiefläche stabilisiert, wobei der Anstieg der Potentialenergie durch Absenkung der Schwingungsnullpunktsenergie überkompensiert wird.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

How this classification was reachedexpand

Full frame machine prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.

metaresearch head score (Codex)0.001
metaresearch head score (Gemma)0.001
Version: metacan-v3-hybrid-931329e0061cValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Bench or experimental · Consensus signal: Bench or experimental
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.008
Threshold uncertainty score0.028

Distilled classifier scores by category (both heads)

CategoryCodexGemma
Metaresearch0.0010.001
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.000
Science and technology studies0.0000.001
Scholarly communication0.0000.001
Open science0.0010.001
Research integrity0.0010.002
Insufficient payload (model declined to judge)0.0080.001

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.017
GPT teacher head0.229
Teacher spread0.211 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Classification

machine, unvalidated

Machine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.

The models applied no category: nothing in the taxonomy fit this work.
Study designBench or experimental
Domainnot available
GenreEmpirical

How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".

Quick stats

Citations3
Published2014
Admission routes1
Has abstractyes

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