SYNTHESIS AND CHARACTERIZATION OF TELLURIUM-CONTAINING CHALCOGEN-NITROGEN HETEROCYCLES

Cl6Te2N2S and Cl2Br4Te2N2S are prepared by oxidation of Cl2TeNSNTe with Cl-2 or Br-2, respectively; reduction of Cl2Br4Te2N2S with Ph(3)Sb gives Br2TeNSNTe, which on treatment with AgAsF6 in liquid SO2 forms [BrTeNSNTe](+)[AsF6](-); bromination of Br2TeNSNTe yields the corresponding Br6Te2N2S; attempts to prepare a dicationic five-membered ring system starting from Cl2TeNSNTe gives the first Te containing dicationic eight-membered chalcogen-nitrogen system [TeNSNTeNSN](2+)[AsF6-](2); reaction of Cl6Te2N2S with Me(3)SiN=S=NSiMe(3) leads to Cl4Te2S2N4.