Synthesis, characterization and crystal structures of a bidentate indazole–thiazine derivative ligand and its cobalt (II) and cadmium (II) metal complexes

A new ligand N-(5,6-dihydro-4H-1,3-thiazin-2-yl)indazole (InTz) and its metal complexes [Co(NO3)2(InTz)2] and [Cd(NO3)2(InTz)2] have been prepared and characterized by a variety of physico-chemical techniques. Likewise, the structures have been determined by X-ray diffraction. Metal complexes have C2 symmetry. The environment around the cobalt atom may be described as a distorted octahedral geometry with the metallic atom coordinated to two oxygen atoms from two monodentate nitrate groups, two thiazine nitrogen atoms and two indazole nitrogen atoms. The cadmium complex consists of molecules in which the cadmium atom is eight coordinated, with two bidentate nitrate groups and two bidentate InTz ligands, each of the latter having one thiazine and one indazole nitrogen atom involved in coordination. The geometry around the cadmium atom is adequately described as a distorted dodecahedron.

Graphical abstractA novel thiazine/indazole derivative ligand N-(5,6-dihydro-4H-1,3-thiazin-2-yl)indazole (InTz) and its cobalt (II) and cadmium (II) complexes were synthesized and characterized by physical measurements. The X-ray crystal structures of InTz, cobalt complex and cadmium complex have also been determined. The geometry around the metallic atoms can be described as a distorted octahedron for cobalt complex and as a distorted dodecahedron for cadmium complex.Figure optionsDownload full-size imageDownload as PowerPoint slide