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Chrysene

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 250°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 β-phenyl-naphthalene. On heating chrysene with hydriodic acid and red phosphorus to 260°C, the hydro-derivatives C18H28 and C18H30 are produced. It gives characteristic addition products with picric acid and dinitroanthraquinone. Impure chrysene is of a yellow colour; hence its name (Gr., golden yellow).

Note - this article incorporates content from Encyclopaedia Britannica, Eleventh Edition, (1910-1911)

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