New poly[(silylene)diacetylenes] and poly[(germylene)diacetylenes]: Synthesis and conductive properties

Article abstract of DOI:10.1021/om00043a037

The reaction of dilithiobutadiyne (or the corresponding di-Grignard reagent) with various dichlorosilanes and dibromogermanes in THF at room temperature afforded poly[(silylene)diacetylenes] and poly[(germylene)diacetylenes], respectively, in high yields. The polymers have a regular alternating arrangement of diyne and silylene or germylene units. When they are doped with FeCl₃, these polymers show conductivity values in the range 10^-5-10^-3 S·cm^-1. The values depend greatly on the electronic character of the substituents bonded to silicon or germanium.