The ReOs<sub>4</sub>(μ-H)(CO)<i><sub>n</sub></i>(<i>n</i>= 19, 18, 16) Clusters
Bibliographic record
Abstract
Addition of Re(CO) 5 (H) to Os 4 (CO) 14 in solution at room temperature affords ReOs 4 (μ-H)(CO) 19 ( 1 ). Careful pyrolysis of 1 in hexane at 85 °C initially yields ReOs 4 (μ-H)(μ-CO)(CO) 17 ( 2 ), which on further heating gives ReOs 4 (μ-H)(CO) 16 ( 3 ). There was no evidence for ReOs 4 (μ-H)(CO) 17 . The four osmium atoms in 1 have a planar kite arrangement with the Re(CO) 5 in an equatorial site, that is, a spiked kite metal skeleton. The H ligand is believed to bridge the OsOs bond (length 2.892(1), 2.904(1) Å; two independent molecules) that is cis to the Re atom, rather than one of the longer OsOs bonds. Cluster 2 has a distorted tetrahedral Os 4 nucleus with the Re(CO) 5 again acting as a spike ligand (i.e., a spiked tetrahedral metal skeleton). Compound 3 has the expected trigonal bipyramidal core of metal atoms with the Re(CO) 4 unit in the equatorial plane. The structures of 1 − 3 are compared to those of the analogous Os 5 (CO) n ( n = 19, 18, 16) clusters. The solution behavior of the new clusters was also investigated by variable-temperature 13 C NMR spectroscopy.
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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 | 0.002 | 0.002 |
| Meta-epidemiology (narrow) | 0.002 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.002 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.002 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.004 | 0.004 |
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".