Single and Double Alkyl Abstraction from a Bis(anilido)xanthene Thorium(IV) Dibenzyl Complex: Isolation of an Organothorium Cation and a Thorium Dication
Bibliographic record
Abstract
Reaction of [(XA 2 )ThCl 2 (dme)] [XA 2 = 4,5-bis(2,6-diisopropylanilido)-2,7-di- tert -butyl-9,9-dimethylxanthene] with 2 equiv of PhCH 2 MgCl resulted in the formation of solvent-free [(XA 2 )Th(CH 2 Ph) 2 ] ( 1 ). Subsequent reaction of 1 with either 1 or 2 equiv of B(C 6 F 5 ) 3 allowed isolation of the first non-cyclopentadienyl actinide alkyl cation, [(XA 2 )Th(CH 2 Ph)][PhCH 2 B(C 6 F 5 ) 3 ] ( 2 ), and a rare example of an actinide dication, [(XA 2 )Th][PhCH 2 B(C 6 F 5 ) 3 ] 2 ( 3 ). The X-ray crystal structure of the dication reveals π-coordination of both PhCH 2 B(C 6 F 5 ) 3 anions, and solution NMR spectroscopy shows that a similar mode of contact ion pairing is operative in the monocation.
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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 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.003 | 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 teacher head, 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".