Synthesis, structures and ab initio studies of selenium and tellurium bis(carbodithioates and carbothioates)

A series of selenium and tellurium bis(carbodithioates and carbothioates) were synthesized. X-Ray structure analysis revealed that Se(SSCC6H4OMe-2)2, Te(SSCC6H4OMe-2)2 and Te(SSCC6H4Me-4)2 have trapezoidal-planar configuration of ES4 (E = Se, Te) and despite the larger atomic radii, the CS⋯Te distances in Te(SSCC6H4OMe-2)2 are comparable to those in the corresponding selenium derivatives Se(SSCC6H4OMe-2)2. Molecular-orbital calculations...