By fusing two nuclei we obtain the formula of naphthalene, C 1 oH 8; by fusing three, the hydrocarbons anthracene and phenanthrene, C14H10; by fusing four, chrysene, C18H12, and possibly pyrene, C16H1n; by fusing five, picene, C22 H 14.
PICENE, a hydrocarbon found in the pitchy residue obtained in the distillation of peat-tar and of petroleum.
Chromic acid in glacial acetic acid solution oxidizes it to picene-quinone, picene-quinone carboxylic acid, and finally to phthalic acid.
The Museo Civico contains antiquities discovered during excavations near the town (in 1880-1884) in the Picene necropolis, dating from the 8th-4th centuries B.C. The town is the birthplace of the condottiere Niccolo Mauruzzi, and of the learned Francis Philelphus, one of the first disseminators of classical literature, who was born in 1398.