Telluropyran derivative T1 can be reversibly oxidized into halogen adducts T1•X₂ (X=Cl, Br, I) with the formation of two Te−X bonds. The halides in the adducts can be exchanged by lighter ones, but not vice versa. The stabilities of the oxidized products are in the order of T1•Cl₂>T1•Br₂>T1•I₂, which are consistent with the calculated rate constants and energy barriers of the elimination reactions.

中文翻译：

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碲吡喃衍生物氧化还原行为和卤素交换的综合研究

碲吡喃衍生物T1可以可逆地氧化成卤素加合物T1•X ₂ (X=Cl,Br,I)并形成两个Te−X键。加合物中的卤化物可以与较轻的卤化物交换，但反之则不然。氧化产物的稳定性依次为T1•Cl ₂ > T1•Br ₂ > T1•I ₂，这与计算的消除反应速率常数和能垒一致。