Tetrametallic Divalent Samarium Cluster Hydride and Dinitrogen Complexes
Why this work is in the frame
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Bibliographic record
Abstract
Reduction of trivalent samarium complexes obtained via reaction of SmCl 3 (THF) 3 with the disodium salt of the dipyrrolide dianion [R 2 C(H 3 C 4 N) 2 ] 2 - (R = Ph, 1 / 2 −(CH 2 ) 5 −) were carried out with sodium in THF and under nitrogen. The two reactions respectively yielded the tetranuclear divalent hydride {Na(THF) 6 }{([Ph 2 C(C 4 H 3 N) 2 ]Sm) 4 (H)(THF) 2 } ( 1 ) and the tetranuclear dinitrogen complex {[(CH 2 ) 5 C(C 4 H 3 N) 2 ]Sm} 4 (THF) 2 (μ-N 2 )[Na(THF)] 2 ·2THF ( 2 ). Transmetalation of [(Me 3 Si)N] 2 Sm(THF) 2 with 1,1-dipyrrolylcyclohexane afforded the dinitrogen complex {[(CH 2 ) 5 C(C 4 H 3 N) 2 ]Sm} 4 (μ-N 2 )·0.5THF ( 3 ). Despite the different oxidation states of 2 and 3 and the presence/absence of alkali-metal cation the two complexes display the same N−N distance.
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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) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.233 | 0.001 |
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.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it