57070-35-6Relevant academic research and scientific papers
Fluoro-olefin Chemistry. Part 12. Some Reactions of 3,4-Dihalogenotetrafluorocyclobutenes: a Synthesis of Perfluorocyclo-octatetraene
Barlow, Michael G.,Crawley, Michael W.,Haszeldine, Robert N.
, p. 122 - 125 (2007/10/02)
Unsuccessful attempts have been made to dehalogenate 3,4-dichlorotetrafluorocyclobutene and 3-chlorotetrafluoro-4-iodocyclobutene.The dichlorobutene yields an unstable complex (?-C4F4Cl2)Fe(CO)4 with Fe2(CO)9.Tetrafluoro-3,4-di-iodocyclobutene gives perfluorocyclo-octatetraene (58percent) upon pyrolysis at 250 deg C, and in addition to the cyclo-octatetraene (31percent), perfluorostyrene (24percent), and tetrafluoro-1,4-di-iodobuta-1,3-diene (37percent) upon pyrolysis at 580 deg C and 0.1 mmHg.With zinc dust, isomeric cyclobutenes are formed by fluorine migration, and the coupled product from copper bronze also result from fluorine migration.With phenylacetylene at 200 deg C, 1,2,3,4-tetrafluorobiphenyl (12percent) is obtained.
