Telluroether to Telluroxide Conversion in the Coordination Sphere of a Metal: Oxidation-Induced Umpolung of a TeAu Bond
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2014 American Chemical Society. While Ph2Te is oxidized into Ph2TeCl2 in the presence of (tht)AuCl (tht = tetrahydrothiophene), reaction of (o-(Ph2P)C6H4)2Te (LTeP2) with the same gold reagent affords the complex LTeP2AuCl (1). Upon reaction with Ph3P, this complex is converted into [LTeP2AuPPh3][Cl] ([Cl]). Complex 1 also reacts with H2O2 to afford the telluroxide gold chloride complex (o-(Ph2P)C6H4)2Te( - O)AuCl (3). The three new complexes have been fully characterized. Their crystal structures indicate the presence of a Te-Au bond with lengths of 2.874(4), 2.937(2), and 2.9864(5) , for 1, [Cl], and 3, respectively. Natural bond orbital analysis shows that oxidation of 1 into 3 results in an umpolung of the Te-Au bond which switches from TeAu in 1 to Te Au in 3. These results show that the telluroxide moiety of 3 acts as a Z-type ligand.
author list (cited authors)
Yang, H., Lin, T., & Gabba, F. P.
complete list of authors
Yang, Haifeng||Lin, Tzu-Pin||Gabbaı̈, François P