Abstract
X-ray crystallography was used to investigate the resulting Ni(II) complex, (tataH)2[Ni(pydc)2]·5.25H2O, (tata = 2,4,6-triamino-1,3,5-triazine, Melamine, and pydcH2 = pyridine-2,6-dicarboxylic acid). This compound crystallized in the monoclinic space group P21/c and Z = 8, with parameters a = 19.8641(6), b = 19.1247(6), c = 17.4442(5)Å and β = 115.8360(10)°. The final R value was 0.0427 for 12714 measured reflections. The coordination number around each Ni(II) atom was six, with a distorted octahedral geometry. The most important features in the crystal structure of this compound are the presence of ion-pairing, metal-ligand coordination and a large number of O-H…O, O-H…N, N-H…O, N-H…N and C-H…O hydrogen bonds.
