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 machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| 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) | 0.002 | 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 source (direct Gemma or distilled Codex), 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".