Eight-membered-ring-forming chain-growth cyclopolymerization of 2,2′-diisocyano-1,1′-binaphthalenes for the synthesis of helical poly([1,4]diazocine-2,3-diyl)s

Abstract Novel helical macromolecules, poly([1,4]diazocine-2,3-diyl)s (PDACs), are synthesized by living cyclopolymerization of 2,2′-diisocyano-1,1′-binaphthalenes in the presence of organonickel or organopalladium complexes as initiators. The conformation of the main PDAC chain obtained from (R)-monomer is deduced from experimental results as (M)-helix and depends on the optical purity of the monomer.