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PICENE, C22H14

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Originally appearing in Volume V21, Page 581 of the 1911 Encyclopedia Britannica.
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PICENE, C22H14 , a See also:hydrocarbon found in the pitchy See also:residue obtained in the See also:distillation of See also:peat-See also:tar and of See also:petroleum. This is distilled to dryness and the distillate repeatedly recrystallized from cymene. It may be synthetically prepared by the See also:action of anhydrous See also:aluminium chloride on a mixture of See also:naphthalene and See also:ethylene dibromide (R. Lespieau, See also:Bull. See also:soc. shim., 1891, (3), 6, p. 238), or by distilling a-dinaphthostilbene (T. Hirn, Ber., 1899, 32, p. 3341). It crystallizes in large colourless plates which possess a See also:blue See also:fluorescence. It is soluble in concentrated sulphuric See also:acid with a See also:green See also:colour. Chromic acid in glacial acetic acid See also:solution oxidizes it to picene-quinone, picene-quinone carboxylic acid, and finally to See also:phthalic acid. When heated with hydriodic acid and See also:phosphorus it forms hydrides of See also:composition C22Ha.: and C22Ha6 (see E. See also:Bamberger and F.D.

Chattaway, See also:

Ann., 1895, 284, p. 61).

End of Article: PICENE, C22H14

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