26385-00-2Relevant academic research and scientific papers
On the Gas-Phase Pyrolysis of 6-Alkylated Pentafulvenes
Zimmermann, Gerhard,Remmler, Matthias,Ondruschka, Bernd,Kopinke, Franz-Dieter,Olk, Bernhard
, p. 1855 - 1860 (2007/10/02)
Gas-phase pyrolysis of the 6-alkylfulvenes 1-3 results in an isomerization process providing the corresponding alkyl aromatics.In addition, monocyclic aromatics with C numbers smaller than those of the starting fulvenes are formed.At temperatures 500 deg C 2 reacts almost exclusively to the isopropenylcyclopentadienes 4 and 5.At higher temperatures the isomerization to the isomeric xylenes is favored (propably on a route including the tautomeric dimethylbenzvalenes).At 575 deg C the resulting yield ratio of o:m:p was determined to be 1:3.7:1.Toluene is the dominant aromatic side product from 2.It is formed predominantly from 4 and 5 (which are closely connected with 2 by isomerization steps) by a radical process.Cyclopentadienylvinyl and vinylcyclopentadienyl radicals are supposed to be essential radical intermediates.
