The highest possible oxidation state of +6 is displayed by the tellurium center in the hexaaryltellurium compounds 1 a and 1 b. Both are extremely thermally stable and, unlike other organotellurium compounds, not light-sensitive. X-ray crystallographic analyses of 1 revealed rare examples of approximate Th molecular symmetry.
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Minoura et al. (1996) studied this question.
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