Solvent-directed control over the topology of entanglement in square lattice (sql) coordination networks

We report herein that the mode of entanglement in square lattice, sql, coordination networks formed by an extended bis-imidazole ligand, L, can be controlled by the solvent used during solvothermal synthesis. [ML2(NO3)2]n (M = Co, Ni) exhibit both parallel 2D → 2D interpenetration and, unusually, mixed entanglement (parallel–inclined 2D → 3D polycatenation).