CALCIUM, STRONTIUM, GERMANIUM, TIN, AND LEAD BIS(TRIMETHYLSILYL)AMIDO DERIVATIVES AND 2,2,6,6‐TETRAMETHYLPIPERIDIDO AND <i>N</i> ‐ISOPROPYLPHENYLAMIDO DERVATIVES OF POTASSIUM AND CALCIUM
Bibliographic record
Abstract
This chapter describes the synthesis of N(SiMe3)2 derivatives of some main group 2 and 14 elements, as well as 2,2,6,6-tetramethylpiperidido and N(Ph)Pri salts of potassium and calcium. The originally described synthetic route to the heaviest group 2 element amides involved a displacement reaction between the group 2 metal (Mg–Ba) and Sn{N(SiMe3)2}2, which affords the calcium and strontium derivatives in good (>80%) yields. The chapter also describes salt elimination method of synthesis that affords pure products for the calcium and strontium derivatives. The synthesis of the divalent group 14 element bis{bis(trimethylsilyl)amido} germanium, tin, and lead complexes constitutes the remaining procedures in the chapter. Salt metathesis reactions between the metal diiodide and KN(SiMe3)2 in tetrahydrofuran (THF) solvent afforded the bis{bis(trimethylsilylamido)}bis(tetrahydrofuran) metal complexes M{N(SiMe3)2}2(THF)2.
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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 | 0.001 |
| 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 | 0.002 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.001 | 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 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".