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Encyclopedia Britannica



CHRYSENE C18H12

This article appears in Volume V06, Page 319 of the Encyclopedia Britannica.

Encyclopedia Britannica - Main :: CHR-CLI
CHRYSENE C18H12 , a hydrocarbon occurring in the high boiling fraction of the coal tar distillate. It is produced in small quantity in the
distillation
  of amber, on passing the vapour of phenyl-naphthyl-methane through a red-hot tube, on
heating
 
indene
 , or by passing the mixed vapours of coumarone and naphthalene through a red-hot tube. It crystallizes in plates or octahedra (from
benzene
 ), which exhibit a
violet
  fluorescence, and melt at 2500 C. Chromic acid in glacial acetic acid solution oxidizes it to chrysoquinone C18H10O2, which when distilled with lead
oxide
  gives chrysoketone C17H10O. When chrysene is fused with alkalis, chrysenic acid, C17H12O3, is produced, which on
heating
  gives fl-phenyl-naphthalene. On heating chrysene with hydriodic acid and red
phosphorus
  to 260 C., the hydro-derivatives C18H2s and C18H3o are produced. It gives characteristic addition products with picric acid and dinitroanthraquinone. Impure chrysene is of a yellow colour; hence its name (Xpuveos,
golden
  yellow). s


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