Discrete Dinuclear Complexes and Two‐Dimensional Architectures from Bridging Polynitrile and Bipyrimidine (bpym) Ligands: Syntheses, Structures and Magnetic Properties of [M2(bpym)(dcne)4(H2O)2] (M = MnII, CoII) and [M2(bpym)(dcne)4(H2O)4]·2H2O (M = FeII, CuII) (dcne− = [(CN)2CC(O)OEt)]−) | Publicación