fluorene

American  

[floor-een, -in, flawr-, flohr-] / ˈflʊər in, -ɪn, ˈflɔr-, ˈfloʊr- /

noun

Chemistry.

1. a white, crystalline, water-insoluble solid, C 13 H 10 , used chiefly in the manufacture of resins and dyes.

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fluorene British  

/ ˈflʊəriːn /

noun

1. a white insoluble crystalline solid used in making dyes. Formula: (C 6 H 4 ) 2 CH 2

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Etymology

Origin of fluorene

From French, dating back to 1880–85; fluor-, -ene

Example Sentences

Oxidizing agents, such as arsenic acid, convert it into ellagic acid, C14H8O9 + H2O, probably a fluorene derivative, a substance which occurs in gall-nuts, in the external membrane of the episperm of the walnut, and probably in many plants, and composes the “bezoar stones” found in the intestines of Persian wild goats.

From Project Gutenberg

The fluorene is separated from this by placing it in a freezing mixture, and is then redistilled or crystallized from glacial acetic acid, or purified by means of its picrate.

From Project Gutenberg

It also acts as a chromogenic centre when double bonds or ethylenic linkages are present, as in fluorene ketone or fluorenone.

From Project Gutenberg

Other hydrocarbon nuclei generally classed as aromatic in character result from the union of two or more benzene nuclei joined by one or two valencies with polymethylene or oxidized polymethylene rings; instances of such nuclei are indene, hydrindene, fluorene, and fluor-anthene.

From Project Gutenberg