Synthesis and characterization of extremely bulky amido-germanium(II) halide complexes
Bibliographic record
Abstract
The extremely bulky aryl/silyl secondary amines, HN(Ar)(SiMe3), Ar = C6H2-i-Pr2(CPh3)-2,6,4 (LDipH), C6H2{C(H)Ph2}2-i-Pr-2,6,4 (L†H), or C6H2{C(H)Ph2}2-t-Bu-2,6,4 (Lt-BuH), have been synthesized via salt metathesis reactions between the appropriate lithium anilide complex and ClSiMe3. The related diaryl secondary amines, HN(Ar*)(R), Ar* = C6H2{C(H)Ph2}2Me-2,6,4 and R = C6H3Me2-3,5 (LMeH), C6H3(CF3)2-3,5 (LCF3H), or C6H2-i-Pr3-2,4,6 (LTripH), were prepared via palladium catalyzed cross-coupling reactions. Three of the amines were crystallographically characterized. Treatment of GeCl2·dioxane with 1 equiv. of each of the deprotonated amines led to the isolation of the amido-germanium(II) chloride complexes, [LGeCl] (L = L†, Lt-Bu, LCF3, or LTrip). Similarly, reaction of the known amido-digermyne, [L*Ge–GeL*] (L* = –N(Ar*)(SiMe3)), with I2 resulted in the oxidative cleavage of the Ge–Ge bond of the digermyne, and the formation of the first two-coordinate amido-germanium(II) iodide complex, [L*GeI]. Crystallographic characterization of [Lt-BuGeCl] and [L*GeI] revealed both to have similar monomeric structures. The compounds described in this study should prove useful as synthons for synthetic chemists working in the field of low oxidation state main group chemistry.
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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) | 0.001 | 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".