Synthesis and Crystal Structure of Tris(9,10-phenanthrenedioxy)cyclotriphosphazene. A New Clathration System
Bibliographic record
Abstract
Tris(9,10-phenanthrenedioxy)cyclotriphosphazene forms inclusion adducts with a wide range of organic small molecules. This novel host molecule crystallized with p -xylene to form a triclinic 1:1 inclusion adduct, space group P 1̄ (No. 2), having unit cell of dimensions a = 12.724(3) Å, b = 19.347(5) Å, c = 9.124(5) Å and α = 97.55(3)°, β = 106.13(3)°, γ = 72.46(2)°, Z = 2. In this adduct, p -xylene is confined within both cage and tunnel-like voids of the host lattice. The same host crystallized with 1,2-dichlorobenzene to form an orthorhombic inclusion adduct, space group P 2 1 2 1 2 1 (No. 19), having a unit cell of dimensions a = 14.880(3) Å, b = 23.277(4) Å, c = 13.429(4) Å, and Z = 4. In general, the guest to host molar ratios for the 1,2-dichlorobenzene adduct varied from 1.1:1 to 1.3:1. 1,2-Dichlorobenzene, o -xylene, p -xylene, benzene, tetrahydrofuran, and cyclohexane were directly imbibed by tris(9,10-phenanthrenedioxy)cyclotriphosphazene to form air stable inclusion adducts. Powder X-ray diffraction of these adducts indicated that the crystal lattice formed is highly guest dependent. Inclusion adducts containing 1,2-dichlorobenzene, o -xylene, and p -xylene as guests were more stable than those containing tetrahydrofuran, benzene, or hexane. Selective inclusion of cyclohexane and o -xylene was achieved from hexane/cyclohexane and p -xylene/ o -xylene mixtures.
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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) | 0.002 | 0.001 |
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".