Synthesis, characterization and crystal structure of a novel two-dimensional network formed by the reaction of a pyrazole ligand with nickel(II) ions

A new supramolecular complex, [NiCl2(Hdmpz)2(H2O)2] (Hdmpz = 3,5-dimethylpyrazole), has been synthesized and characterized by elemental analyses, mass spectrometry, conductivity measurements, IR and UV–Vis spectroscopies. The behavior of the complex in different solvents is described. The complex has also been characterized crystallographically: the Ni(II) atom is surrounded by two Cl atoms, two N atoms from Hdmpz and two molecules of water to attain a pseudo octahedral structure. All the ligands are trans-orientated. In this structure, intermolecular interactions have been identified and studied. Extended structure analyses revealed a novel two-dimensional network in the (1 0 0) plane formed by intermolecular O–H···Cl and N–H···Cl hydrogen bonding interactions.

Graphical abstractA new supramolecular complex ([NiCl2(Hdmpz)2(H2O)2]) was obtained by reaction of NiCl2·6H2O and 3,5-dimethylpyrazole (Hdmpz). X-ray single-crystal diffraction analyses revealed a 2D network formed by intermolecular O–H···Cl and N–H···Cl hydrogen bondings.Figure optionsDownload full-size imageDownload as PowerPoint slide