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Olefins cyclodimerization

Apparently, the dimerization of 4 is considerably more facile than that of MCP or BCP, resembling those of (dichloromethylene)cyclopropane (455) and radicophilic olefins with a capto-dative substitution pattern [125], some of which are known to cyclodimerize even at room temperature. Indeed, the capto-datively substituted methylenecyclopropane 85 undergoes the homodimerization at 60 °C (Scheme 65) [126]. [Pg.75]

Polymers from the Thermal (27t + 271) Cyclodimerization of Fluorinated Olefins... [Pg.39]

The first report of the cyclodimerization of fluorinated olefins was provided by Lewis and Naylor,3 working at E.I. DuPont de Nemours Co., in 1947. While studying the pyrolysis of polytetrafluoroethylene (PTFE), the compound octa-fluorocyclobutane was isolated from the pyrolysis off-gas stream. The researchers identified the product and speculated that it was formed by the cyclodimerization... [Pg.39]

A new method for the syntheses of fluorocarbon polyarylate polymers has been demonstrated. The chemistry utilizes the [2jt+2rr] cyclodimerization of fluorinated olefins and generates polymers of novel composition. The first generation of polymers prepared by this method are polyarylate homopolymers. Theremoplastic polymers of high molecular weight can be achieved via neat or solution polymerization. One example of a thermoset polymer prepared by this method has a high Tg, low dielectric constant and dissipation factor, low moisture... [Pg.343]

See other pages where Olefins cyclodimerization is mentioned: [Pg.795]    [Pg.280]    [Pg.795]    [Pg.280]    [Pg.118]    [Pg.70]    [Pg.168]    [Pg.39]    [Pg.39]    [Pg.40]    [Pg.40]    [Pg.41]    [Pg.62]    [Pg.25]    [Pg.25]    [Pg.26]    [Pg.26]    [Pg.27]   
See also in sourсe #XX -- [ Pg.25 , Pg.26 ]

See also in sourсe #XX -- [ Pg.25 , Pg.26 ]

See also in sourсe #XX -- [ Pg.25 , Pg.26 ]



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Cyclodimerization

Cyclodimerizations

Fluoropolymers (cont thermal cyclodimerization of olefins

Thermal cyclodimerization of fluorinated olefins

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