Synthesis and X‐ray Structures of the Polycyclic Dimers {[PhB(μ‐N<i>t</i>Bu)<sub>2</sub>AsN(<i>t</i>Bu)H]LiI}<sub>2</sub> and [PhB(μ‐N<i>t</i>Bu)<sub>2</sub>AsN(<i>t</i>Bu)Li]<sub>2</sub>
Bibliographic record
Abstract
Abstract The metathesis of [PhB( μ ‐N t Bu) 2 ]AsCl and t BuN(H)Li in 1:1 molar ratio in diethyl ether produced the amido derivative [PhB(μ‐N t Bu) 2 AsN( t Bu)H] ( 1 ) in good yield. The lithiation of 1 with one equivalent of n BuLi afforded the lithium salt [PhB(μ‐N t Bu) 2 AsN( t Bu)Li] ( 2a ). Both 1 and 2a were characterized by multinuclear NMR spectroscopy. The crystal structure of 2a is comprised of a U‐shaped, centrosymmetric dimer in which the monomeric [PhB(μ‐N t Bu) 2 AsN( t Bu)] − Li + units are linked by Li‐N interactions to give a six‐rung ladder. Oxidation of 2a with one‐half equivalent of I 2 in diethyl ether resulted in hydrogen abstraction from the solvent to give the dimeric lithium iodide adduct {[PhB(μ‐N t Bu) 2 AsN( t Bu)H]LiI} 2 ( 1 ·LiI) with a central Li 2 I 2 ring.
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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 | 0.001 | 0.002 |
| Meta-epidemiology (narrow) | 0.004 | 0.004 |
| Meta-epidemiology (broad) | 0.004 | 0.002 |
| Bibliometrics | 0.001 | 0.003 |
| Science and technology studies | 0.003 | 0.003 |
| Scholarly communication | 0.001 | 0.002 |
| Open science | 0.003 | 0.003 |
| Research integrity | 0.003 | 0.004 |
| Insufficient payload (model declined to judge) | 0.000 | 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; 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".