Syntheses and crystal structures of two structurally diverse cobalt complexes constructed from 5-hydroxyl-1,3-benzenedicarboxylates

Two structurally diverse compounds, {[Co(4,4′-bipy)(H2O)4](hmbdc)(H2O)}n (1) and {[Co(4,4′-bipy)(hmbdc)(H2O)2](4,4′-bipy)(DMF)}n (2) (H2hmbdc=5-hydroxyl-1,3-benzenedicarboxylic acid, 4,4′-bipy=4,4′-bipyridine), were synthesized using different starting materials and solvents. Compound 1 possesses hydrogen-bonded 3D networks encapsulating 1D covalently bonded infinite [Co(4,4′-bipy)(H2O)4]2+ chain. Compound 2 shows a 2D architecture and free 4,4′-bipy and DMF molecules fill in the channels of the extended 3D hydrogen bonding network as guest molecules.