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In the title compound, C18H13Te2+·CF3O3S, the TeII atom of the cation and one O atom of the tri­fluoro­methane­sulfonate counter-ion form a close-to-linear Te—Te—O system, with a Te—Te—O angle of 172.3 (1)° and a Te—O distance of 2.816 (5) Å, which may suggest the presence of a three-centre–four-electron (3c–4e) bond. Secondary Te...O inter­actions [3.003 (4) and 3.016 (4) Å], involving the second TeII atom of the binuclear mol­ecule, are also noted, resulting in a supra­molecular layer in the bc plane.
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