Citation: Colacio, Enrique; Lloret, Francesc; Navarrete, Miguel; Romerosa, Antonio; Stoeckli-Evans, Helen; Suarez-Varela, Jos\'e (2005). 2D and 3D coordination polymers based on 2,2′-bipyrimidine and cyanide bridging ligands incorporating coordinated and guest ammonia molecules. Synthesis, crystal structures, magnetic properties and thermal analysis of {[Ni(CN)4]2[(Ni(NH3)2)2(bpym)]·2H2O}n and {[Cu2(CN)2(bpym)]·NH3}n. New Journal of Chemistry, 29, pp. 1189-.