Tetrakis[μ-[4-methyl-<i>N</i>-[2-(Oxo-κ<i>O</i>)-3-piperidinyl- κ<i>N</i>]benzenesulfonamidato]]dirhodium
Bibliographic record
Abstract
[3S-Tetrakis[μ-[4-methyl-N-[2-(oxo-κO)-3-piperidinyl-κN]benzenesulfonamidato]]dirhodium [1042906-10-4] C48H60N8O12Rh2S4 (MW 1274.13) InChI = 1S/4C12H16N2O3S.2Rh/c4*1-9-4-6-10(7-5-9)18(16,17)14-11-3-2-8-13-12(11)15;;/h4*4-7,11,14H,2-3,8H2,1H3,(H,13,15);;/q;;;;2*+2/p-4/t4*11-;;/m0000../s1 InChIKey = GASINLFKFDJQQH-GBHGIEMESA-J [3R-Tetrakis[μ-[4-methyl-N-[2-(oxo-κO)-3-piperidinyl-κN]benzenesulfonamidato]]dirhodium [1219010-05-5] C48H60N8O12Rh2S4 (MW 1274.13) InChI = 1S/4C12H16N2O3S.2Rh/c4*1-9-4-6-10(7-5-9)18(16,17)14-11-3-2-8-13-12(11)15;;/h4*4-7,11,14H,2-3,8H2,1H3,(H,13,15);;/q;;;;2*+2/p-4/t4*11-;;/m1111../s1 InChIKey = GASINLFKFDJQQH-GQHLIFFDSA-J (chiral catalyst for enantioselective intramolecular CH amination with sulfamates) Alternate Name: Rh2(S-nap)4. Physical Data: [α]D −19.5 (c 1.00, CHCl3); 1H NMR (400 MHz, CD3CN) δ 7.83 (d, 4H, J = 8.4 Hz), 7.74 (d, 4H, J = 8.4 Hz), 7.46 (d, 4H, J = 8.0 Hz), 7.37 (d, 4H, J = 8.0 Hz), 5.96–5.93 (m, 4H), 3.39–3.24 (m, 6H), 3.03–2.99 (m, 6H), 2.49 (s, 6H), 2.45 (s, 6H), 1.98–1.91 (m, 2H), 1.65–1.47 (m, 10H), 1.30–1.25 (m, 4H) ppm, HRMS (ES+) calcd. for C48H60N8O12Rh2S4: 1274.1324. Found: 1274.1327 (M+).1 Solubility: sol acetone, dichloromethane, acetonitrile. Form Supplied in: blue-green solid; not commercially available. Preparative Methods: a round-bottom flask is charged with rhodium tetraacetate (433 mg, 0.98 mmol), 4-methyl-N-(2-oxopiperidin-3-yl)benzenesulfonamide (2.11 g, 7.84 mmol, 8 equiv), and 40 mL of chlorobenzene. Chlorobenzene is slowly distilled under nitrogen (∼2–3 h) until ∼5 mL of solvent remained. The reaction is cooled, the receiving flask is emptied, and the reaction flask is recharged with another 40 mL of chlorobenzene, and the distillation procedure was performed a second time. After repeating this cycle two additional times, the supernatant (∼2 mL) of the resulting dark purple suspension is purified by chromatography on silica gel (4:1 CH2Cl2/CH3CN). The isolated material was dissolved in 15 mL of acetone and concentrated under reduced pressure. The blue solid was allowed to stand under high vacuum (∼1 Torr) at 80 °C for 12 h to remove the acetone and to afford the desolvated dirhodium complex as a blue-green solid (968 mg, 77%).1 Handling, Storage, and Precautions: air stable but hygroscopic.
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 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 | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.012 | 0.004 |
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".