Synthesis and Structures of Scandium and Lutetium Benzyl Complexes
Bibliographic record
Abstract
Scandium and lutetium benzyl complexes were prepared. Reaction of [ScCl 3 (THF) 3 ] with potassium benzyl afforded [Sc(CH 2 Ph) 3 (THF) 3 ] ( 1 ). In the solid state the coordination polyhedron is a distorted octahedron, in which the benzyl groups are located in a facial arrangement on one side of the molecule. One of the coordinated THF molecules could be removed by trituration with toluene and recrystallization of 1 from toluene to give [Sc(CH 2 Ph) 3 (THF) 2 ] ( 2 ). A significantly different compound is obtained by starting the transmetalation reaction at −196 °C. Under these conditions the reaction of ScCl 3 with KCH 2 Ph led to a two-dimensional coordination polymer of composition [Sc(CH 2 Ph) 5 K 2 (THF) 3 ] n ( 3 ), in which the scandium atom is surrounded by five benzyl groups in a trigonal bipyramidal fashion. Under the same reaction conditions, but using LuCl 3 as the starting material, the analogue of 1, [Lu(CH 2 Ph) 3 (THF) 3 ] ( 4 ), is obtained, which can also be induced to lose a coordinated THF ligand to give [Lu(CH 2 Ph) 3 (THF) 2 ] ( 5 ).
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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".