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Record W2083989082 · doi:10.1039/c001253j

Hydrogen exchange in formic acid dimer: tunnelling above the barrier

2010· article· en· W2083989082 on OpenAlexaff
David Luckhaus

Bibliographic record

VenuePhysical Chemistry Chemical Physics · 2010
Typearticle
Languageen
FieldPhysics and Astronomy
TopicAdvanced Chemical Physics Studies
Canadian institutionsUniversity of British Columbia
Fundersnot available
KeywordsQuantum tunnellingChemistryDegenerate energy levelsDimerFormic acidHamiltonian (control theory)PolarizabilityAdiabatic processRectangular potential barrierDensity functional theoryRaman spectroscopyHydrogenMolecular physicsComputational chemistryAtomic physicsChemical physicsPhysicsCondensed matter physicsQuantum mechanicsMolecule

Abstract

fetched live from OpenAlex

The Raman spectrum of formic acid dimer in the OH stretch fundamental range is analysed in terms of a fully coupled vibrational Hamiltonian for the seven most important in-plane degrees of freedom involved in the hydrogen exchange process. The Raman spectrum calculated with potential and polarizability functions obtained from density functional theory reproduces the observed band structure. Wavepacket calculations reveal a remarkably slow hydrogen exchange on the timescale of several ps even at excess energies in the range of 10-15 kJ mol(-1). The highly non-statistical process is shown to proceed via adiabatic tunnelling even if excess energy is deposited directly into the reaction coordinate.

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 distilled prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesMeta-epidemiology (narrow)
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 score0.215
Threshold uncertainty score1.000

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0010.000
Meta-epidemiology (broad)0.0010.000
Bibliometrics0.0000.000
Science and technology studies0.0000.001
Scholarly communication0.0000.000
Open science0.0010.000
Research integrity0.0000.002
Insufficient payload (model declined to judge)0.0000.000

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 head0.008
GPT teacher head0.240
Teacher spread0.232 · 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 teacher head, not a consensus.

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

Citations35
Published2010
Admission routes1
Has abstractyes

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