Bibliographic record
Abstract
[2749-70-4] C15H16O2 (MW: 228.286) InChI = InChI=1S/C15H16O2/c1-3-7-14(8-4-1)11-16-13-17-12-15-9-5-2-6-10-15/h1-10H,11-13H2 InChIKey = JCTHGPXQXLMSDK-UHFFFAOYSA-N (alkylation of enolates,1, 2 protection of alcohols3) Alternatives Names: dibenzyloxymethane; bis(phenylmethoxy)methane; 1,1′-[methylenebis(oxymethylene)]bisbenzene; 1,5-diphenyl-2,4-dioxapentane; {[(benzyloxy)methoxy]methyl}benzene; formaldehyde dibenzylacetal; formaldehyde dibenzyl acetal; formaldehyde–dibenzylacetal; benzylformal; dibenzylformal; benzyl alcohol formal; benzoxymethoxymethylbenzene; benzyloxymethoxymethylbenzene; phenylmethoxymethoxymethylbenzene; Preventol D2; Preventol-D2 Physical Data: bp 188 °C/13 Torr; d 1.0665 g cm−3; n D 20 1.5480. Solubility: insol H2O; sol chloroform, benzene, tetrahydrofuran, toluene, dichloromethane, carbon tetrabromide, carbon tetrachloride, acetonitrile, methanol, 1,2-dichloroethane, diethyl ether. Form Supplied In: typically prepared as a colorless oil.4, 5 Analysis of Reagent Purity: IR (cm−1): 3089, 3065, 3032, 1497, 1454, 1380, 1136, 7394; 1H NMR (200 MHz), CDCl3): δ = 7.34 (m, 10H), 4.84 (s, 2H), 4.65 (s, 4H); 13C NMR (50 MHz, CDCl3): δ = 137.79, 128.41, 127.91, 127.70, 93.90, 69.48.5 Preparation Methods: prepared from benzyl alcohol and bromochloromethane with 3 equiv of NaH in dry THF refluxed for 14 h (eq 1).5 Alternatively, benzyl alcohol and paraformaldehyde with a catalytic amount of kaolinite can be used.4 (1) Purification: a solvent extraction in Et2O/H2O is usually required.5 Excess of benzyl alcohol can be removed by distillation.4 Handling, Storage, and Precaution: may be harmful if ingested, inhaled, or absorbed through skin; avoid formation of dust and aerosols. Keep container tightly closed in a dry and well-ventilated place.
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 | 0.000 |
| Meta-epidemiology (narrow) | 0.002 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.068 | 0.049 |
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".