Di-<i>tert</i>-butyl(methyl)phosphonium Tetrafluoroborate
Bibliographic record
Abstract
[479094-62-7] C9H22BF4P (MW 248.05) 1S/C7H17P.BF4/c1-6(2)8(5)7(3)4;2-1(3,4)5/h6-7H,1-5H3;/q;-1/p+1 InChIKey = WSCITMBVIUHGRR-UHFFFAOYSA-O (ligand precursor for palladium-catalyzed cross-coupling reactions) Alternate Name: bis(1,1-dimethylethyl)methylphosphine tetrafluoroborate. Physical Data: mp >275–279 °C (decomposition). Solubility: soluble in organic solvents such as acetone. Slightly soluble in water. Form Supplied in: white powder; widely available. Purification: recrystallized from acetone/n-pentane. Preparative Method: the title compound is prepared from (t-Bu2)MeP and an aqueous solution of HBF4.1 Handling, Storage, and Precautions: this compound has been classified as a corrosive material. This reagent can be harmful if swallowed or inhaled. This reagent might cause severe eye or skin irritation. Avoid contact with skin or eyes. The toxicity of this reagent is not known; therefore, it should be manipulated in a well-ventilated hood. Protective gloves, clothing, and eye/face protection should be worn while manipulating this reagent.
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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 | 0.005 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.002 | 0.001 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.002 | 0.000 |
| Research integrity | 0.002 | 0.001 |
| Insufficient payload (model declined to judge) | 0.007 | 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; 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".