Syntheses and X-ray crystallographic studies of {[Ni(en)2(pot)2]0.5CHCl3} and [Ni(en)2](3-pytol)2

Two novel Ni(II) complexes {[Ni(en)2(pot)2]0.5CHCl3} (3) {pot = 5-phenyl-1,3,4-oxadiazole-2-thione} (1) and [Ni(en)2](3-pytol)2 (4) {3-pytol = 5-(3-pyridyl)-1,3,4-oxadiazole-2-thiol} (2) have been synthesized using en as coligand. The metal complexes have been characterized by physical and analytical techniques and also by single crystal X-ray studies. The complexes 3 and 4 crystallize in monoclinic system with space group P21/a and P121/c, respectively. The complex 3 has a slightly distorted octahedral geometry with trans (pot)− ligands while 4 has a square planar geometry around the centrosymmetric Ni(II) center with ionically linked trans (3-pytol)− ligands. The π⋯π (face to face) interaction plays an important role along with hydrogen bondings to form supramolecular architecture in both complexes.

Graphical abstractTwo new Ni(II) complexes, {[Ni(en)2(pot)2]0.5CHCl3}(3) and [Ni(en)2](3-pytol)2 (4), have been synthesized and characterized by spectroscopic and spectrometric methods, and their X-ray crystallography structures are reported. In complex 3, the 2D lattices resulting from a parallel stacking of {[Ni(en)2(pot)2]0.5CHCl3} form regular open channels in which the CHCl3 solvent molecules are enclosed along the a axis.Figure optionsDownload full-size imageDownload as PowerPoint slide