Polymerization of Furil in the Solid State by Reaction with AsF5 at the Solid-Gas Interface

摘要

Solid-state polymerization of furil, induced by reaction with AsF5 at the solid-gas interface, has been investigated by means of vibrational analysis of the reactant and the product. Infrared spectra are consistent with the mode of polymerization which involves an alpha linkage and subsequent loss of hydrogen atoms. The C/H elemental analysis suggests that the polymer consists of around six or seven monomeric units. The reaction product is found to be unstable at high temperatures; a prolonged annealing at this temperature leads to a different structure, possibly, by the opening of the furan rings. The x-ray powder diffraction study shows that the polymeric furil is crystalline, with a lattice similar to that of the monomer, but contains a considerable amount of disorder.