High molecular weight poly([ 1.1.1]propellane)s and a new polyamide with bicyclo[1.1.1]pentane fragments

Communication: A polyamide, where the amide functions are connected via rigid, non‐aromatic units, which forms liquid‐crystalline phases in concentrated sulfuric acid and is thus suitable for the preparation of fibers is reported. The synthesis has been made possible by a breakthrough in the ability to produce high molecular weight poly([1.1.1]‐propellane)s (see Figure). magnified image