The dimeric and two-dimensional copper(II) complexes constructed from salicylic acid and 4,4′-bipyridine

Two novel complexes, [Cu2(Hsal)4(4,4′-bipyridine)(H2O)2(DMF)2] (1) (H2sal=salicylic acid) and {[Cu(Hsal)2(4,4′-bipyridine)](H2O)(H2sal)}n (2), were synthesized by layered-solution method and structurally characterized. Geometries of copper atoms in both complexes exhibit square pyramidal. Complex 1 is a dimer and hydrogen bonds between water and DMF molecules extend the structure into 1D hydrogen bonding network. Complex 2 consists of two-dimensional square framework structure.