Phosphonoacetic acid as a building block in supramolecular chemistry: salts with organic polyamines
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Bibliographic record
Abstract
Phosphonoacetic acid, (HO)(2)P(O)CH(2)COOH, forms adducts with a range of amines. The acid component in these adducts may be the neutral molecule C(2)H(5)O(5)P, the mono-anion (C(2)H(4)O(5)P)(-) or the di-anion (C(2)H(3)O(5)P)(2-). The substructure formed by the acid component takes the form of simple chains in compounds (1)-(3), which are the 1:1 adducts formed with 1,4-diazabicyclo[2.2.2]octane, 4,4'-bipyridyl and 1,3-trimethylenedipiperidine, respectively. These adducts contain C(2)H(5)O(5)P, (C(2)H(4)O(5)P)(-) and (C(2)H(3)O(5)P)(2-), respectively, although (3) is solvated by a mixture of methanol and water. The (C(2)H(4)O(5)P)(-) anion substructure in (4), which is the adduct formed with meso-5,5,7,12,12,14-hexa-C-methyl-1,4,8,11-tetraazacyclotetradecane, is a chain of spiro-fused rings, while the substructure in (5), which is the adduct formed with 2,2'-dipyridylamine, is a chain of edge-fused rings. In (6), the adduct formed with 1,2-bis(4'-pyridyl)ethane, the anion substructure is two-dimensional. The chain substructures are linked by the amine units into two-dimensional structures in (1) and (4) and into three-dimensional frameworks in (2), (3) and (5), while the anion sheets in (6) are likewise linked by the amine units into a three-dimensional framework.
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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) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.003 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| 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 it