18‐Crown‐6 and Titanium Tetrafluoride − Preparation of the Ti<sup>IV</sup> Fluoride Crown Ether Complexes (TiF<sub>4</sub>)<sub>2</sub>(18‐Crown‐6) and the Stabilization of <i>cis‐</i>TiF<sub>4</sub>(H<sub>2</sub>O)<sub>2</sub> in [{<i>cis‐</i>TiF<sub>4</sub>(H<sub>2</sub>O)<sub>2</sub>}<sub>2</sub>(18‐Crown‐6)]
Bibliographic record
Abstract
Abstract Reaction of TiF 4 and 18‐crown‐6 in MeCN affords the molecular complex [( cis‐ TiF 4 ) 2 (18‐crown‐6)] ( 1 ) only. Water and THF displace the 18‐crown‐6 in the tetrafluoro complex 1 , with the formation of cis‐ TiF 4 L 2 . The complex cis‐ TiF 4 (H 2 O) 2 and 18‐crown‐6 form [{ cis‐ TiF 4 (H 2 O) 2 } 2 (18‐crown‐6)] ( 2 ), in which cis‐ TiF 4 (H 2 O) 2 and 18‐crown‐6 are connected by hydrogen bonding through the protons of coordinated H 2 O in TiF 4 (H 2 O) 2 and the oxygen atoms of the crown ether. Complexes 1 and 2 were characterized by X‐ray single crystal analysis, elemental analysis, IR, NMR and Mass spectroscopy. The relative basicities of the 18‐crown‐6 and the molecular donor ligands MeCN, THF, H 2 O toward Ti IV fluoride were established by NMR spectroscopic investigations of the substitution reactions. 18‐crown‐6 is slightly more basic than MeCN, similar to that of Et 2 O, and less basic than THF and H 2 O. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)
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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 | 0.010 | 0.004 |
| Meta-epidemiology (narrow) | 0.009 | 0.008 |
| Meta-epidemiology (broad) | 0.009 | 0.005 |
| Bibliometrics | 0.002 | 0.008 |
| Science and technology studies | 0.004 | 0.007 |
| Scholarly communication | 0.003 | 0.005 |
| Open science | 0.008 | 0.005 |
| Research integrity | 0.005 | 0.014 |
| Insufficient payload (model declined to judge) | 0.000 | 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 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".