Bibliographic record
Abstract
The metal(II) complexes of 4-amino-2,6-dichloropyrimidine (L) have been synthesized and characterized by IR and electronic spectroscopies, percentage metal, magnetic moments, conductance and melting point measurement{where M = Mn, Fe, Co, Ni, Cu and Zn}.The ligand coordinates to the metal ions in the ratio 2L: 1M, through the nitrogen atoms of the pyrimidine ring and the amino group.The electronic spectra and room temperature magnetic measurements were consistent with the adoption of a 6-coordinate octahedral geometry for Fe(II) and Ni(II) complexes while Mn(II), Cu(II),Co(II) and Zn(II) complexesassume a 4-coordinate square-planar/ tetrahedral geometry.The conductance measurements in DMSO showed that the Fe(II) complex was covalent, the Ni(II) complex wasa 1:1 electrolyte and the remaining metal complexes were 1:2 electrolytes respectively.The in-vitro antibacterial studies revealed that the Co(II) complex had a broad-spectrum antibacterial activity against Bacillus cereus, Escherichia coli, Pseudomonas aeruginosa and Staphylococcus aureus with inhibitory zones range of 11.0-25.0mm proving its potential usefulness as a broad-spectrum antibacterial agent.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.002 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.003 | 0.002 |
| Open science | 0.001 | 0.002 |
| Research integrity | 0.002 | 0.001 |
| Insufficient payload (model declined to judge) | 0.858 | 0.826 |
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; the direct Gemma label and the distilled Codex classifier 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".