Nickel(II) complexes of tetradentate NSNO pyridylthioazophenol ligands: Synthesis, characterization and crystal structure

Two sets of nickel(II) complexes of a series of tetradentate NSNO ligands were synthesized and isolated in their pure form. All these complexes, formulated as [Ni(L)Cl]2 and [Ni(L)(N3)]2 [HL = pyridylthioazophenols], were characterized using physicochemical and spectroscopic tools. The solid-state structures of two complexes (1a and 2a) were established by X-ray crystallography. The geometry about the nickel ion of the complexes is octahedral and the complexes are dimeric in nature. In 1, two Ni(II) ions are bridged by two Cl− anions while in 2 they are bridged by two azide ions in a μ-1,1-bridging fashion.

Graphical abstractTwo sets of nickel(II) complexes of a series of tetradentate NSNO ligands have been synthesized and isolated in their pure form. All these complexes were characterized by elemental and spectroscopic analyses. The solid-state structures of two complexes (1a and 2a) were established by X-ray crystallography.Figure optionsDownload full-size imageDownload as PowerPoint slide