Synthesis and structure of bisiodobis(diisopropyldithiocarbamato)tellurium(IV)

The title mixed ligand complex was synthesized by the controlled oxidative displacement reaction of TeL 4 ″ by iodine (L″ is diisopropyldithiocarbamate ion). Its crystals are monoclinic, space group P21 withZ=2 in a unit cell of dimensionsa=8.344(4),b=14.113(8),c=10.647(5) A,β=99.884(2)°, andV=1235.15 A3, finalR=0.043 andR w =0.047 for 3553 unique reflections. The central tellurium atom shows a S4I2 six coordination with the two dithiocarbamate groups almost isobidentate, the average Te-S and the Te-I distances being 2.571(3) and 3.011(1) A, respectively. The structure is monomeric in the solid state. No intermolecular short contacts are observed.