Substrate Tumbling in a Chemisorbed Diastereomeric α‐Ketoester/1‐(1‐Naphthyl)ethylamine Complex
Bibliographic record
Abstract
Abstract Scanning tunneling microscopy (STM) data for α‐ketoester/1‐(1‐naphthyl)ethylamine complexes on Pt(111) reveal a tumbling motion that couples two neighboring binding states. The interconversion, resulting in prochiral inversion of the α‐ketoester, occurs in single complexes without breaking them apart. This is a surprising observation because the overall motion requires rotation of the α‐ketoester away from the surface without branching exclusively into diffusion away from the complex or desorption. The multi‐step interconversion is rationalized in terms of sequences of bound states that combine transient H‐bond interactions with the chiral molecule and weakened adsorption interactions with the metal. The observation of tumbling in single long‐lived complexes is of relevance to self‐assembly and directed molecular motion on surfaces, to ligand‐controlled surface reactions, and most directly to stereocontrol in asymmetric heterogeneous catalysis.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot 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.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 0.000 |
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.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
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".