Crystal Structures of Spiroborates Derived from [1,1′-Binaphthalene]-2,2′-diol (BINOL)
Bibliographic record
Abstract
Ammonium salts of bis[[1,1′-binaphthalene]-2,2′-diolato- O, O ’] borate ( 4 ) were prepared by the reaction of boric acid with both racemic and enantiomerically pure [1,1′-binaphthalene]-2,2′-diol (BINOL). Four salts were crystallized, and their structures were solved by X-ray diffraction. In all cases examined, spiroborate 4 was found to adopt a flattened D 2 conformation similar to the one favored by analogous spiroborates derived from 2,2′-dihydroxybiphenyl. Spiroborate 4 has an essentially invariant molecular geometry, can be synthesized and derivatized by straightforward methods, and is readily available in both racemic and enantiomerically pure forms of high configurational stability. For these reasons, it is an attractive starting point for creating crystals and other ordered materials with predetermined structures and properties.
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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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.005 | 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".