Soluble poly(para-phenylene)s, 3. Variation of the length and the density of the solubilizing side chains


  • Part 2: cf. 1.

  • Dedicated to Dr. A. Hüthig on the occasion of his 90th birthday


The synthesis of a variety of alkyl-chain-substituted poly(para-phenylene) (PPP) derivatives, including those with systematically decreased density of side chains, is described, using for their preparation the Pd-catalyzed polymerization method recently developed in Mainz (Mainz route to PPP's). The degrees of polymerization achieved range between 30 and 50, allowing the synthesis of structurally well-defined and soluble PPP's with more than hundred 1,4-phenylene rings attached to each other.