Self-assembly of a Co(II) dimer through H-bonding of water molecules to a 3D open-framework structure

Reaction of pyridine-2,4,6-tricarboxylic acid (ptcH(3)) with Co(NO3)(2).6H(2)O in presence of 4,4'-bipyridine (4,4'-bpy) in water at room temperature results in the formation of {[Co-2(PtcH)(2)(4,4'-bpy) (H2O)(4)].2H(2)O}, (1). The solid-state structure reveals that the compound is a dimeric Co(II) complex assembled to a 3D architecture via an intricate intra- and inter-molecular hydrogen-bonding interactions involving water molecules and carboxylate oxygens of the ligand ptcH(2-). Crystal data: monoclinic, space group P2(1)/c, a = 11.441(5) Angstrom, b = 20-212(2) Angstrom, c = 7.020(5) Angstrom, beta = 103.77(5)degrees, V = 1576.7(1) Angstrom(3), Z = 2, R1 = 0.0363, wR2 = 0.0856, S = 1.000.