A novel group of potassium-containing 1-D coordination polymers demonstrates the importance and role of KÀ ÀCp interactions. [K(Odpp)] ? , 1, (Odpp ¼ 2,6-diphenylphenolate) forms a ladder-type polymer where extensive KÀ ÀCp interactions provide additional coordinative saturation. {[K 2 (Odpp) 2 H 2 O] 2 } ? , 2, consists of tetrameric cores of K 4 O 6 polyhedra linked via a network of KÀ ÀCp interactions. Compound 2 displays not only inter-and intramolecular KÀ ÀCp contacts, but also several KÀ ÀH agostic interactions that provide further coordinative saturation.