AbstractIn the search for organic ferromagnets polymers with a conjugated backbone and pendant persistent radicals are one route of interest. The synthesis of poly[4‐(4‐ethynylphenyl)‐2′,4′,6′‐trinitro‐2,6‐diphenyldiphenylamine](p‐3)and poly[4‐(3‐ethynylphenyl)‐2′,4′,6′‐trinitro‐2,6‐diphenyldiphenylamine](m‐3)as precursors of polyradicals are described. A dinuclear rhodium cyclooctadiene chloride complex as polymerization catalyst was used to yield polymers with molecular weights (gel‐permeation chromatogr