Synthesis and characterization of complexes of some hydroxyaryltellurium trichlorides with N-donor ligands

Article abstract of DOI:10.1080/00945719909349509

Twenty new complexes of hydroxyaryltellurium trichlorides derived from isomeric cresols and ortho-chlorophenol with pyridine (Py), 2,2′-bipyridyl (Bipy) and piperidine (Pip) have been synthesized and characterized by elemental analyses, conductance, cryoscopy, infrared and proton magnetic resonance studies. Pyridine and piperidine form RTeCl₃.L and RTeCl₃.2L complexes, whereas 2,2′-bipyridyl which acts as a bidentate ligand and gives only RTeCl₃.L complexes. Conductance and cryoscopic measurements reflect their weak or 1:1 electrolytic behaviour in solution of nitrobenzene, acetonitrile and acetone. Spectral studies indicate the linkage of these ligand molecules to the tellurium atom of the hydroxyaryltellurium group through nitrogen atoms. A square-pyramidal structure is suggested for RTeCl₃.Py and RTeCl₃.Pip, whereas 1:2 complexes of pyridine and piperidine along with RTeCl₃.Bipy, have octahedral stereochemistry.