Synthesis and Characterization of Vanadium(V)−Phosphinimide Complexes
Bibliographic record
Abstract
Synthetic routes to vanadium(V)-phosphinimide derivatives are addressed. Initial synthetic efforts afforded the known compound formulated as VCl(2)(NPPh(3))(3) which was crystallographically determined to be the salt [VCl(NPPh(3))(3)]Cl (1). Reactions of the vanadium-imide precursors VCl(3)(NAr) (Ar = Ph, C(6)H(3)-2,6-iPr(2)) with R(3)PNSiMe(3) (R = Ph, iPr, tBu) afforded VCl(2)(NPh)(NPPh(3)) (4), VCl(2)(NPh)(NPiPr(3)) (5), VCl(2)(NPh)(NPtBu(3)) (6), VCl(2)(NC(6)H(3)-2,6-iPr(2))(NPPh(3)) (7), VCl(2)(NC(6)H(3)-2,6-iPr(2))(NPiPr(3)) (8), and VCl(2)(NC(6)H(3)-2,6-iPr(2))(NPtBu(3)) (9) in yields ranging from 72% to 84%. Subsequent alkylation or arylation reactions resulted in VMe(2)(NC(6)H(3)-2,6-iPr(2))(NPtBu(3)) (10), VPh(2)(NPh)(NPtBu(3)) (11), VPh(2)(NC(6)H(3)-2,6-iPr(2))(NPiPr(3)) (12), and VPh(2)(NC(6)H(3)-2,6-iPr(2))(NPtBu(3)) (13) while substitution reactions with Li[N(SiMe(3))(2)] and Li[SBn] gave VCl(N(SiMe(3))(2))(NPh)(NPtBu(3)) (14) and V(SBn)(2)(NC(6)H(3)-2,6-iPr(2))(NPtBu(3)) (15) in yields ranging from 40% to 49% yield. Polarization of the N-P phosphinimide bond and V-N multiple bond character are evidenced by crystallographic data.
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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 | 0.000 |
| 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) | 0.045 | 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".