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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



(or 1,3-pentadiene),


a colorless liquid, insoluble in water but soluble in most organic solvents. Piperylene exists in the cis- and trans- forms (boiling points, 44.07°C and 42.03°C; densities at 20°C, 0.691 and 0.676 g/cm3, respectively). It enters into all reactions characteristic of conjugated diene hydrocarbons.

Piperylene is found in petroleum cracking products; it is a by-product of isoprene synthesis (from isobutylene and formaldehyde) and can also be obtained by dehydrogenation of n-pentenes. It polymerizes and copolymerizes readily—for example, with isoprene and styrene.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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The biplot obtained from this analysis showed that all of the volatile compounds evaluated except 1,3-pentadiene were highly related with PC1 (Figure 1).
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