Cerium(IV) Tellurite Halides [Ce2Te7O17]X2 (X = Cl– or Br–): The First Cerium-Containing Cationic Frameworks

Two isotypic cerium tellurite halides with the formulas [Ce(2)Te(7)O(17)]Cl(2) and [Ce(2)Te(7)O(17)]Br(2) have been synthesized hydrothermally via the reactions of CeCl(3) and CeBr(3) with TeO(2). The structures of these compounds feature a cationic inorganic framework. The Ce(IV) dimers are bound by a novel 3D Te(7)O(17)(6-) building unit, forming an unusual hexagonal-bipyramidal environment around Ce(IV).