Synthesis, Characterization, and Organometallic Derivatives of Diamidosilyl Ether Thorium(IV) and Uranium(IV) Halide Complexes
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Bibliographic record
Abstract
The high-yield synthesis and spectroscopic and structural characterization of two new dimeric uranium(IV) and thorium(IV) halide complexes {[ tBu NON]AnCl 2 } 2 (An = U ( 1 ), Th ( 2 )) supported by the doubly deprotonated diamidosilyl ether ligand [(CH 3 ) 3 CNH(Si(CH 3 ) 2 )] 2 O ([ tBu NON] 2 - ) are reported. The reaction of 1 / 2 equiv of 1 or 2 with 2 equiv of LiCH 2 Si(CH 3 ) 3 or C 3 H 5 MgCl generates stable organoactinides of the form [ tBu NON]AnR 2 (R = C 3 H 5, An = U ( 3 ), Th ( 4 ); R = CH 2 Si(CH 3 ) 3, An = U ( 5 ), Th ( 6 )). The reaction of 1 / 2 equiv of 1 or 2 with 1 equiv of Na(C 5 (CH 3 ) 5 ) results in [ tBu NON]An(η 5 -C 5 (CH 3 ) 5 )Cl (An = U ( 7 ), Th ( 8 )), which can be converted to the mixed amido/Cp complex [ tBu NON]An(C 5 (CH 3 ) 5 )CH 3 (An = U ( 9 ), Th ( 10 )) by reaction with CH 3 MgBr. The uranium(IV) complexes were characterized by paramagnetically shifted 1 H NMR spectra; the U−C H 2 and U−C H 3 resonances for 5 and 9 are at δ −148.9 and −146.3, respectively. The 1 H and 13 C{ 1 H} NMR spectra of the thorium(IV) complexes are also consistent with these formulations; the Th− CH 2 resonances in 6 are at δ 0.0 and 85.58 for 1 H and 13 C{ 1 H}, respectively. The variable-temperature magnetic susceptibilities of the uranium(IV) halide dimer 1 and monomer 7 are also reported.
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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) | 0.001 | 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 it