Trimethylsilylchalcogenolates of Co(II) and Mn(II): From Mononuclear Coordination Complexes to Clusters Containing −ESiMe<sub>3</sub> Moieties (E = S, Se)
Bibliographic record
Abstract
The Co(II) and Mn(II) complexes (tmeda)Co(ESiMe(3))(2) (E = S, 1a; E = Se, 1b), (3,5-Me(2)C(5)H(3)N)(2)Co(ESiMe(3))(2) (E = S, 2a; E = Se, 2b), [Li(tmeda)](2)[(tmeda)Mn(5)(mu-ESiMe(3))(2)(ESiMe(3))(4)(mu(4)-E)(mu(3)-E)(2)] (E = S, 3a; E = Se, 3b), [Li(tmeda)](2)[Mn(SSiMe(3))(4)] (4), [Li(tmeda)]4[Mn(4)(SeSiMe(3))(4)(mu(3)-Se)(4)] (5), and [Li(tmeda)](4)[Mn(Se(4))(3)] (6) (tmeda = N,N,N',N'-tetramethylethylenediamine) have been isolated from reactions of Li[ESiMe(3)] and the chloride salts of these metals. The treatment of (tmeda)CoCl(2) with two equivalents of Li[ESiMe(3)] (E = S, Se) yields 1a and 1b, respectively, whereas similar reactions with MnCl(2) yield the polynuclear complexes 3a (E = S) and 3b (E = Se). The selective preparation of the mononuclear complex 4 is achieved by increasing the reaction ratios of Li[SSiMe(3)] to MnCl(2) to 4:1. Single crystal X-ray analysis of complexes 1-5, confirms the presence of the trimethylsilylchalcogenolate moieties and distorted tetrahedral geometry around the metal centers in each of these complexes. The structure of the tris(tetraselenide) complex [Li(tmeda)](4)[Mn(Se(4))(3)] (6), isolated in small quantities from the preparation of 5, is also described.
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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) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 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 | 0.001 | 0.001 |
| 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 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".