Star-shaped Te(VI)-Te(VI) complex and an octanuclear heterometallic Te₂Sb₆ oxo cluster

The reaction of telluric acid with di-organotellurium di chloride (R₂TeCl₂) and tri-organoantimony dichloride (R₃SbCl₂) has been carried out in binary solvent using solvothermal synthesis method and isolated high-phase purity compounds. Single crystal X-ray diffraction studies revealed the formation of a novel mixed valent tellurium (VI) containing clusters Te^VI[OTe^IV(p-MeOC₆H₄)₂Cl]₆ (R = p-MeOC₆H₄) (1) and [Te(µ₂-O₅SbPh₃)(OSbh₃Cl)]₂ (2). Cluster 1 has a central Te(VI) atom which is connected to six oxygen atoms octahedrally, further this oxygens bridging to six other tellurium atoms (IV). Cluster 2 is an octanuclear heterometallic cluster that is built up of a [Te (VI), Sb (V)] Te₂Sb₆ oxo-centered butterfly core. The products have been analyzed using single crystal X-ray diffractions, powder X-ray diffraction, and IR spectroscopic and analytical methods.

A star-shaped mixed valent tellurium [(VI), (IV)] cluster Te^VI[OTe^IV(p-MeOC₆H₄)₂Cl]₆ (1) has been synthesized in binary solvent (Acetonitrile/DMF) medium. Cluster [Te(µ₂-O₅SbPh₃)(OSbh₃Cl)]₂ (2) is an octanuclear heterometallic assembly built up of Te (VI) and Sb (V) ions, containing an oxo-centered butterfly core.