Abstract

A novel method for polymerization of the acetylenic bond in 2-ethynylpyridines is described. Formation of a donor-acceptor complex between the pyridine ring in the monomer and molecular bromine provides sufficient activation for the acetylenic triple bond to undergo spontaneous polymerization. The products obtained are substituted polyacetylenes with extensively conjugated backbones, wherein the side group pyridine rings are complexed to bromine in a 1:1 ratio. They are black or brown amorphous solids soluble in polar solvents, indicative of their ionic nature

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