Localized Reaction at\na Smooth Metal Surface: <i>p</i>-Diiodobenzene at Cu(110)
Bibliographic record
Abstract
Halogenation at a semiconductor surface follows simple\ndynamics\ncharacterized by “localized reaction” along the direction\nof the halide bond being broken. Here we extend the study of halide\nreaction dynamics to the important environment of a smooth metal surface,\nwhere greater product mobility would be expected. Extensive examination\nof the physisorbed reagent and chemisorbed products from two successive\nelectron-induced reactions showed, surprisingly, that for this system\nproduct localization and directionality described the dynamics at\na metal. The reagent was <i>p</i>-diiodobenzene on Cu(110)\nat 4.6 K. The first C–I bond-breaking yielded chemisorbed iodophenyl\nand I-atom(#1), and the second yielded phenylene and I-atom(#2). The\nobserved collinear reaction resulted in secondary encounters among\nproducts, which revealed the existence of a surface-aligned reaction.\nThe molecular dynamics were well explained by a model embodying a\ntransition between an <i>a priori</i> ground state and a\nsemiempirical ionic state, which can be generally applied to electron-induced\nchemical reactions at surfaces.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot 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.
Codex and Gemma teacher scores by category
| 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) | 0.162 | 0.011 |
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; both teacher heads agree on what is shown here.
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".