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Record W2275902918 · doi:10.1107/s1600536801006572

(6b<i>R</i>,10a<i>S</i>)-6b,10a-Dimethyl-10,10a-dihydro-9<i>H</i>-fluoranthene

2001· article· en· W2275902918 on OpenAlexaff
Masood Parvez, Dan V. Simion, Ted S. Sorensen

Bibliographic record

VenueActa Crystallographica Section E Structure Reports Online · 2001
Typearticle
Languageen
FieldMaterials Science
TopicPhotochromic and Fluorescence Chemistry
Canadian institutionsUniversity of Calgary
Fundersnot available
KeywordsRing (chemistry)MoietyFluorantheneChemistryNaphthalenevan der Waals forceEne reactionCrystallographyCrystal structureStereochemistryCyclohexane conformationMoleculeHydrogen bondPhotochemistry

Abstract

fetched live from OpenAlex

The crystal structure of the title compound, C18H20, contains mol­ecules which are separated by normal van der Waals distances. The methyl groups attached at the junction of the ace­naphthyl­ene and cyclo­hexyl rings are cis with respect to each other. The naphthalene ring in the ace­naphthyl­ene moiety is essentially planar, with the remaining two C atoms lying 0.206 (6) and 0.253 (6) Å on opposite sides of the plane of the naphthalene ring. The five-membered ring adopts an envelope conformation and the cyclo­hexyl ring is in a slightly flattened chair conformation. The molecular dimensions are as expected.

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 imitation

Not 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.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: metacan-v3-hybrid-931329e0061cValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Bench or experimental · Consensus signal: Bench or experimental
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.013
Threshold uncertainty score0.045

Distilled classifier scores by category (both heads)

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.000
Science and technology studies0.0000.000
Scholarly communication0.0000.000
Open science0.0000.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0130.004

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.

Opus teacher head0.008
GPT teacher head0.236
Teacher spread0.228 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Classification

machine, unvalidated

Machine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.

The models applied no category: nothing in the taxonomy fit this work.
Study designBench or experimental
Domainnot available
GenreEmpirical

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".

Quick stats

Citations1
Published2001
Admission routes1
Has abstractyes

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Same venueActa Crystallographica Section E Structure Reports OnlineSame topicPhotochromic and Fluorescence ChemistryFrench-language works237,207