Amphoteric tellurium-containing π-donors'acceptors are reported. The electrical and magnetic properties of the charge-transfer complexes and radical cation salts prepared from 1 (see Figure; X Te, R1 Me) are presented. 1 exhibits a remarkably low oxidation potential compared with S analogues and a one-step two-electron reduction potential, indicating that its derivatives could also be of use as the first Te-containing organic electron acceptors.
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