Bis(2-phenoxyphenyl)dichalcogenides and their chemical reactivity

• The oxidation reactions of [2-(C6H5O)C6H4]2E2 (ESe, Te) with SO2Cl2 are discussed.
• [O(C6H4)2]SeCl2 and [2-(C6H5O)C6H4]TeCl3 are formed under anhydrous conditions.
• Te···Cl and Te···Phcentroid intermolecular interactions led to dimeric associations in [2-(C6H5O)C6H4]TeCl3.
• Phenoxachalcogenine 10-oxides [O(C6H4)2]EO resulted by oxidation in the presence of water.

Diorganodichalcogenides of type [2-(C6H5O)C6H4]2E2 [ES (1), Se (2), Te (3)] were prepared and structurally characterized by multinuclear NMR (1H, 13C, 77Se or 125Te, as appropriate) and ESI+ mass spectrometry. The oxidation reaction of the diorganodichalcogenides 2 and 3 with SO2Cl2 under anhydrous conditions led to the phenoxaselenine 10,10-dichloride (5) and to the organotellurium trichloride, [2-(C6H5O)C6H4]TeCl3 (4), respectively. Further hydrolysis with a KOH solution led to a mixture of phenoxachalcogenine 10-oxide [chalcogen = Se (7), Te (8)] and phenoxachalcogenine [chalcogen = Se (9), Te (10)] in each case. The crystal and molecular structures of compounds 2–5 and 7 were determined by single-crystal X-ray diffraction.

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