Lectionary Calendar
Monday, November 4th, 2024
the Week of Proper 26 / Ordinary 31
Attention!
For 10¢ a day you can enjoy StudyLight.org ads
free while helping to build churches and support pastors in Uganda.
Click here to learn more!

Bible Encyclopedias
Fluorene

1911 Encyclopedia Britannica

Search for…
or
A B C D E F G H I J K L M N O P Q R S T U V W Y Z
Prev Entry
Fluoranthene
Next Entry
Fluorescein
Resource Toolbox
Additional Links

(a-diphenylene methane), C 13 H 10 or (C6H4)2CH2, a hydrocarbon found in coal-tar. It is obtained from the higher boiling fractions, after separation of naphthalene and anthracene, by fractional distillation, the portion boiling between 290-340° C. being taken. 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. It may be prepared by distilling diphenylene ketone over zinc dust, or by heating it with hydriodic acid and phosphorus to 150-160° C.; and also by passing the vapour of diphenyl methane through a red hot tube. It crystallizes in colourless plates, possessing a violet fluorescence, melting at 112-113° and boiling at 293-295° C. By oxidation with chromic acid in glacial acetic acid solution, it is converted into diphenylene ketone (C8H4)2 CO; whilst on heating with hydriodic acid and phosphorus to 250-260° C. it gives a hydro derivative of composition C13H22.

Bibliography Information
Chisholm, Hugh, General Editor. Entry for 'Fluorene'. 1911 Encyclopedia Britanica. https://www.studylight.org/​encyclopedias/​eng/​bri/​f/fluorene.html. 1910.
 
adsfree-icon
Ads FreeProfile