Triphenyltellurium(IV) Diethyldithiocarbamate-Synthesis and Crystal Structure: A New Example Showing Sterically Sensitive Long Te—S Bonds

Abstract

Triphenyltellurium(IV) diethyldithiocarbamate has been synthesized and subjected to single crystal structure determination which indicates that in the solid state the molecule exists as a centrosymmetric dimer in which the diethyl dithiocarbamate ligand can be considered as acting as a bridge (through its two sulfur atoms) with long Te—S bonds. Each tellurium atom also becomes six coordinated by weakly interacting with another sulfur atom of the dithiocarbamate ligand. The coordination environment around each tellurium is a very distorted octahedral constituted by two facial sets, one consisting of three carbon atoms and the other of three sulfur atoms. The IR spectrum of Ph₃Te(S₂CNEt₂) exhibits two v(Te—S) bands at 285 and 185 cm⁻¹. The complete dissociation of Ph₃Te(S₂CNEt₂) into Ph₃Te⁺ and Et₂NCS₁ ⁻ has not been evidenced even in DMF and DMSO at ∼1 mM concentration level.

Key Words:

• Triphenyltellurium(IV) diethyldithiocarbamate
• crystal structure
• dithiocarbamate
• tellurium.