Reaction of H<sub>2</sub>S with MoRu(CO)<sub>6</sub>(dppm)<sub>2</sub> to give H<sub>2</sub> and a bridged-sulfide product via hydrido-sulfhydryl intermediates (dppm = Ph<sub>2</sub>PCH<sub>2</sub>PPh<sub>2</sub>)
Bibliographic record
Abstract
Oxidative addition of H2S to MoRu(CO)6(µ-dppm)2 (1) at ~20 °C in toluene yields an isolable complex formulated as Mo(CO)3(µ-SH)(µ-CO)(µ-dppm)2RuH(CO) (2) via the possible intermediate Mo(CO)3(µ-H)(µ-CO)(µ-dppm)2Ru(SH)(CO) (4) (dppm = Ph2PCH2PPh2) that is detectable at lower temperatures. Over 2 days, species 2 in toluene loses H2 (and CO) to yield the bridged-sulfide product, Mo(CO)2(µ-CO)(µ-S)(µ-dppm)2Ru(CO) (5) that is also formed directly from the reaction of 1 with elemental sulfur. The solid-state molecular structure of 5 is determined by X-ray crystallography. A further hydrido-sulfhydryl species, possibly Mo(CO)3(µ-SH)(µ-H)(µ-dppm)2Ru(CO)2 (3), is in equilibrium with 2 at ambient temperature.Key words: molybdenum, ruthenium, bis(diphenylphosphino)methane, hydrogen sulfide, hydrido-sulfhydryl species, carbonyl complexes, bridged-sulfide complex.
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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 | 0.000 |
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".