Syntheses, spectral and crystallographic studies of novel monometallic Co(II) and Zn(II) complexes with phenyl-(5-pyridin-4-yl[1,3,4]thiadiazol-2-yl)-amine

Two novel monometallic complexes [Co(ppt)(SO4)(H2O)4)]·H2O (1) and [Zn(ppt)2(CH3COO)2(H2O)2]·(2) of ppt = phenyl-(5-pyridin-4-yl[1,3,4]thiadiazol-2-yl)-amine have been synthesized and their structures investigated by elemental analyses, IR, UV–Vis., magnetic susceptibility and single crystal X-ray. The geometry of both complexes are distorted octahedral. The π–π and CH⋯π interactions play important role along with hydrogen bonding to form host–guest cavity. The hydrogen-bonding interactions between adjacent layers extend these structures to overall 3D supramolecular architectures.