Six polysilanes which contain the units in the title were synthesized by sodium condensation of phenylethynyldichlorosilane with several other dichlorosilanes in toluene. The structures of these polymers were characterized by IR
UV and NMR spectra. Some complexes can be formed by the reaction of the polysilanes with strong electron acceptors. The new UV absorbance peaks of these complexes were found. The resistivities of the polymer bulks and the complexes were tested.