Crystal structure of poly[[(μ<sub>3</sub>-hydroxido-κ<sup>3</sup> <i>O</i>:<i>O</i>:<i>O</i>)(μ<sub>3</sub>-selenato-κ<sup>3</sup> <i>O</i> <sup>1</sup>:<i>O</i> <sup>2</sup>:<i>O</i> <sup>3</sup>)tris[μ<sub>3</sub>-2-(1,2,4-triazol-4-yl)acetato-κ<sup>3</sup> <i>N</i> <sup>1</sup>:<i>N</i> <sup>2</sup>:<i>O</i>]tricopper(II)] dihydrate]
Bibliographic record
Abstract
The title coordination polymer, {[Cu 3 (C 4 H 4 N 3 O 9 ) 3 (SeO 4 )(OH)]·2H 2 O} n or ([Cu 3 (μ 3 -OH)(trgly) 3 (SeO 4 )]·2H 2 O), crystallizes in the monoclinic space group P 2 1 / c . The three independent Cu 2+ cations adopt distorted square-pyramidal geometries with {O 2 N 2 +O} polyhedra. The three copper centres are bridged by a μ 3 -OH anion, leading to a triangular [Cu 3 (μ 3 -OH)] core. 2-(1,2,4-Triazol-4-yl)acetic acid (trgly-H) acts in a deprotonated form as a μ 3 -κ 3 N 1 : N 2 : O ligand. The three triazolyl groups bridge three copper centres of the hydroxo-cluster in an N 1 : N 2 mode, thus supporting the triangular geometry. The [Cu 3 (μ 3 -OH)(tr) 3 ] clusters serve as secondary building units (SBUs). Each SBU can be regarded as a six-connected node, which is linked to six neighbouring triangles through carboxylate groups, generating a two-dimensional uninodal (3,6) coordination network. The selenate anion is bound in a μ 3 -κ 3 O 1 : O 2 : O 3 fashion to the trinuclear copper platform. The [Cu 3 (OH)(trgly) 3 (SeO 4 )] coordination layers and guest water molecules are linked together by numerous O—H...O and C—H...O hydrogen bonds, leading to a three-dimensional structure.
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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 | 0.011 | 0.005 |
| Meta-epidemiology (narrow) | 0.019 | 0.021 |
| Meta-epidemiology (broad) | 0.019 | 0.017 |
| Bibliometrics | 0.014 | 0.038 |
| Science and technology studies | 0.016 | 0.014 |
| Scholarly communication | 0.007 | 0.012 |
| Open science | 0.029 | 0.014 |
| Research integrity | 0.017 | 0.029 |
| Insufficient payload (model declined to judge) | 0.004 | 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; both teacher heads agree on what is shown here.
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".