Recently, it has been reported that cupric acetate in pyridines) and cuprous chloride in pyridine2) were effective homogeneous reagents for the oxidative coupling of ethynyl compounds. Using these reagents, the authors synthesized a series of conjugated polyacetylenes from the corresponding diethynyl compounds. Lower homologues of these polymers were also prepared in order to study the influence of phenyl, biphenyl and ...
