Experimental and Theoretical Investigations of Tellurium(IV) Methanediides and Their Insertion Products with Sulfur and Iodine

The reactions of Li2[C­(Ph2PS)2] with tellurium tetrahalides in a 1:1 molar ratio in toluene afford the complexes {TeX2[C­(Ph2PS)2]}2 (7a, X = Cl; 7b, X = Br; 7c, X = I). These complexes dimerize through halide bridges in the solid state, and the tridentate ligand is S,C,S-coordinated to the tellurium center with a Te–C bond length of 2.024(3), 2.030(6), and 2.045(8) Å, respectively. In the case of TeBr4, small amounts of the complex …