Synthesis and Reactivity of a Diruthenium Diazoalkane Complex
Bibliographic record
Abstract
Reaction of [Ru 2 (μ-CO)(CO) 4 (μ-dppm) 2 ], 1, dppm = Ph 2 PCH 2 PPh 2, with N 2 CHCO 2 Et gives the complex [Ru 2 (μ-NNCHCO 2 Et)(CO) 4 (μ-dppm) 2 ], 2, in which the diazoalkane acts as a novel 2-electron ligand bridging a metal−metal bond. Complex 2 reacts with phenylacetylene, with displacement of a carbonyl ligand, to give [Ru 2 (μ-CO)(CO) 2 {μ-NN(CHCO 2 Et)(CPh CH)}(μ-dppm) 2 ], 3a, which contains a new type of metallacycle formed by coupling of the diazoalkane and alkyne ligands at the diruthenium center. Protons attack complex 2 first at the NCH center to give the alkyldiazonium complex [Ru 2 (CO) 4 (μ-NNCH 2 CO 2 Et)(μ-dppm) 2 ] +, 4, and then, with the strong acid H[BF 4 ], at the Ru−Ru bond to give the dicationic complex [Ru 2 (μ-H)(CO) 4 (μ-NNCH 2 CO 2 Et)(μ-dppm) 2 ] 2+, 5 . Complex 2 is a precatalyst for the decomposition of formic acid to give CO 2 and H 2, and the chemistry leading to the active catalyst is described.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| 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 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".