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A hydrogen-bonded supermolecular compound [(C6H5N2O)3?Cu1.5]?6H2O was syn- thesized from picolinamide and Cu(NO3)2?6H2O at the presence of sodium pyrophosphate deca- hydrate. It crystallizes in triclinic, space group P1 with a = 1.05947(8), b = 1.09130(8), c = 1.11456(8) nm, α = 67.8460(10), β = 84.497(1), γ = 74.6210(10)o, C18H27Cu1.5N6O9, Mr = 566.77, V = 1.15077(15) nm3, Z = 2, Dc = 1.636 g/cm3, F(000) = 585, μ = 1.461 mm?1, R1 = 0.0278 and wR2 = 0.0749. In the complex, the Cu(II) ion reveals a distorted tetradentate plane-tetragonal geometry. The structure consists of neutral two-dimensional layers via hydrogen bonds O–H???O and N–H???O between the molecules, and the layers are connected by weak interactions of the Cu–Cu, Cu–N, π-π and hydrogen bonds to form a three-dimensional network structure.
A hydrogen-bonded supermolecular compound [(C6H5N2O) 3 • Cu1.5] • 6H2O was syn-theized from picolinamide and Cu (NO3) 2 • 6H2O at the presence of sodium pyrophosphate deca- hydrate. It crystallizes in triclinic, space group P1 with a = 1.05947 (8), b = 1.09130 (8), c = 1.11456 (8) nm, α = 67.8460 (10), β = 84.497 (1), γ = 74.6210 (10) o, C18H27Cu1.5N6O9, Mr = 566.77, V = 1.15077 (15) nm3, Z = 2, Dc = 1.636 g / cm3, F (000) = 585, μ = 1.461 mm1, R1 = 0.0278 and wR2 = 0.0749. (II) ion reveals a distorted tetradentate plane-tetragonal geometry. The structure consists of two-dimensional layers via hydrogen bonds O-H ??? O and N-H ??? O between the molecules, and the layers are connected by weak interactions of the Cu-Cu, Cu-N, π-π and hydrogen bonds to form a three-dimensional network structure.