Summary
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1.
An investigation was made of the thermal transformations of 1,3-pentadiene (piperylene) in a flow system a 600° in a quartz tube filled with crushed quartz glass.
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2.
In the specified conditions 1,3-pentadiene forms a complex mixture of hydrocarbons of various classes: gaseous (methane, ethane, propane, isobutane, alkenes), liquid (isoprene, pentenes, cyclopentadiene, benzene, toluene, xylenes) and solid (naphthalene, and condensed systems with the general formula CnH2n−18).
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3.
The yield of cyclopentadiene does not exceed 1% reckoned on the original 1,3-pentadiene.
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4.
Formation of a considerable amount fo aromatic hydrocarbons must be attributed to condensation reactions of dienes.
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Shuikin, N.I., Novikov, S.S. & Naryshkina, T.I. Thermal transformations of 1,3-pentadiene. Russ Chem Bull 3, 779–782 (1954). https://doi.org/10.1007/BF01170122
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DOI: https://doi.org/10.1007/BF01170122