Synthesis and characterization of [M<sup>II</sup>(bqb)] (M = Co, Ni, Cu), [N(<i>n</i>-Bu)<sub>4</sub>][Co<sup>III</sup>(bqb)(CN)<sub>2</sub>], and [N(<i>n</i>-Bu)<sub>4</sub>][Co<sup>III</sup>(bqb)(N<sub>3</sub>)<sub>2</sub>] containing deprotonated <i>N</i>,<i>N</i>'-bis(2-quinolinecarboxamide)-1,2-benzene (bqb) X-ray crystal structures of [Ni<sup>II</sup>(bqb)] and [N(<i>n</i>-Bu)<sub>4</sub>][Co<sup>III</sup>(bqb)(N<sub>3</sub>)<sub>2</sub>]
Bibliographic record
Abstract
Cobalt(II), nickel(II), copper(II), and two cobalt(III) complexes of a new dianionic ligand, bqb, [H 2 bqb = N,N'-bis(2-quinolinecarboxamide)-1,2-benzene] have been synthesized and characterized by elemental analyses, IR, and 1 H NMR spectroscopy. The crystal and molecular structures of the [Ni(bqb)] (2) and [N(n-Bu) 4 ][Co III (bqb)(N 3 ) 2 ] (5) complexes were determined by X-ray crystallography. Complex 2 crystallizes in the monoclinic space group C2/c with a distorted square-planar structure including two short NiN (1.848 Å) and two long NiN (1.958 Å) bonds. The structure consists of sheets formed in the plane parallel to the b axis and diagonal to vectors a and c by intermolecular hydrogen bonds. Complex 5 crystallizes in the monoclinic space group C2 with a distorted octahedral structure. The [N(n-Bu) 4 ] + ion is disordered at the C3A and C4A atoms of one Bu. The IR and 1 H NMR spectra of the complexes are also discussed.Key words: N 4 -dianionic amido ligand (bqb), (bqb) complexes of Co(II), Ni(II), Cu(II), and Co(III), azide, cyanide, X-ray crystal structures.
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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 | 0.006 |
| Meta-epidemiology (narrow) | 0.013 | 0.014 |
| Meta-epidemiology (broad) | 0.018 | 0.006 |
| Bibliometrics | 0.008 | 0.008 |
| Science and technology studies | 0.007 | 0.009 |
| Scholarly communication | 0.004 | 0.007 |
| Open science | 0.007 | 0.003 |
| Research integrity | 0.009 | 0.013 |
| Insufficient payload (model declined to judge) | 0.000 | 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; 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".