Synthesis and Characterization of Novel Group 16 Element Compounds with Oxidation State IV or VI Having Carbon Ligands

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We report here, 1) the systematic synthesis hypervalent tetraaryltellurium(IV) compounds bearing substituents at the para position of the aryl rings, and the first SP structure of Te(IV) compound was found; 2) Newly prepared organotelluronium salts showed green-blue color in solution as the heavier main group element homologue and analogue instead of the central carbon atom of Crystal Violet; 3) Functionalization reactions of hexaorganotelluriums(VI) were investigated using (4-bromophenyl)pentaphenyltellurium(VI) which was prepared form the reaction of pentaphenyltellurium cation with 4-bromophenyl lithium. Functionalization reactions of the bromo-compound were proceeded to give useful cross-coupling products having octahedral structure around Te(VI).