Synthesis and crystal structure of (1,4,7,10-tetraazacyclododecane-κ<sup>4</sup> <i>N</i>)(tetrasulfido-κ<sup>2</sup> <i>S</i> <sup>1</sup>,<i>S</i> <sup>4</sup>)manganese(II)
Bibliographic record
Abstract
The title compound, [Mn(S 4 )(C 8 H 20 N 4 )], was accidentally obtained by the hydrothermal reaction of Mn(ClO 4 ) 2 ·6H 2 O, cyclen (cyclen = 1,4,7,10-tetraazacyclododecane) and Na 3 SbS 4 ·9H 2 O in water at 413 K, indicating that polysulfide anions might represent intermediates in the synthesis of thiometallate compounds using Na 3 SbS 4 ·9H 2 O as a reactant. X-ray powder diffraction proves that the sample is slightly contaminated with NaSb(OH) 6 and an unknown crystalline phase. The crystal investigated was twinned with a twofold rotation axis as the twin element, and therefore a twin refinement using data in HKLF-5 format was performed. The asymmetric unit of the title compound consists of one Mn II cation, one [S 4 ] 2− anion and one cyclen ligand in general positions. The Mn II cation is sixfold coordinated by two cis -S atoms of the [S 4 ] 2− anions, as well as four N atoms of the cyclen ligand within an irregular coordination. The complexes are linked via pairs of N—H...S hydrogen bonds into chains, which are further linked into layers by additional N—H...S hydrogen bonding. These layers are connected into a three-dimensional network by intermolecular N—H...S and C—H...S hydrogen bonding. It is noted that only one similar complex with Mn II is reported in the literature.
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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) | 0.002 | 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 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".