Synthesis, Physicochemical Studies and Biological Properties of Mixed-Ligand Nickel(II) Complexes Containing β-Diketones With N-donor Ligands
Bibliographic record
Abstract
Some mixed ligand nickel(II) complexes of thenoyltrifluoroacetone (tta-H) with 2,2ꞌ-bipyridine (bipy), 1,10-phenanthroline (phen) and tetramethylethylenediamine (tmen) [Ni(tta)(N-N)(NO3)]; N-N= bipy, phen, or tmen] have been synthesized and characterized by molar conductance measurements, elemental analysis, mass spectrometry, spectral measurements and antimicrobial activities. Attempt to prepare the mixed ligand nickel(II) complexes containing acetylacetone (acacH), benzoylacetone (bzacH), dibenzoylmethane (dbm-H) and thenoyltrifluoroacetone (tta-H) with ethylenediamine associated with NO3 counter ion led to the formation of [Ni(β-diketone)2en]. The β-diketones enolized acting as bidentate ligand, coordinating to the metal with carbonyl and enolic oxygen, ethylenediamine (en) coordinates to the metal using N, N chromophores. The nickel complexes of the type [Ni(tta)(N-N)NO3)] are five-coordinate square pyramidal in geometry while those of the type [Ni(β-diketone)2en] are six-coordinate octahedral geometry. The conductivity measurement in nitromethane revealed that the [Ni(tta)(N-N)NO3)] complexes are non-electrolyte. The complexes were screened for their in-vitro antimicrobial activity against six microorganisms. A comparison of the complexes with gentamicin showed that most of the complexes are resistant to tested organisms except [Ni(tta)2(en)].H2O, [Ni(bzac)2(en)] and [Ni(bta)2(en)] which compared favourably well in Staphylococcus aureus.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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; 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".