Synthesis and Spectral Investigation of Co(II), Ni(II), Cu(II) and Zn(II) Complexes with Novel N4 Ligands
Bibliographic record
Abstract
Four new tetradentate amine-N donor ligands have been prepared by reducing Schiff bases derived from the condensation of 2-aminonicotinaldehyde with 1,2-diaminoethane (APMED)/ 1,2- diaminopropane (APMPD)/1,3-diaminopropane (APMP'D)/trans-cyclohexane-1,2-diamine (APMCD). The ligands react with transition metal (Co(II)/Ni(II)/Cu(II)/Zn(II)) salts to give microcrystalline solid complexes of 1 : 1 (M : L) composition. The ligands and the metal complexes have been characterized with analyses, molar conductance measurements, magnetic susceptibility measurements and spectroscopic investigations like mass, IR, electronic, NMR and ESR. All the complexes were found to have octahedral geometry holding 0-6 water molecules in the lattice with a general molecular formula (MLCl2).n H2O.
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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 | 0.000 |
| 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), 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".