Chrysene
From LoveToKnow 1911
CHRYSENE C 18 H 12, 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 C 18 H 10 O 2, which when distilled with lead oxide gives chrysoketone C17H100. When chrysene is fused with alkalis, chrysenic acid, C17H1203, is produced, which on heating gives 0-phenyl-naphthalene. On heating chrysene with hydriodic acid and red phosphorus to 260° C., the hydroderivatives 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 (xpuocos, golden yellow) .
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