The New Inorganic Ligands TeCl2 and TeBr2: Syntheses and Crystal Structures of Re6Te6Cl6(TeCl2)2 and [Re6Te8(TeBr2)6]Br2

TeBr2 and TeCl2, unstable molecules which have previously been characterized only in the gas phase, are present as ligands in the new cluster compounds Re6Te6Cl6(TeCl2)2 and [Re6Te8(TeBr2)6]Br2. In Re6Te6Cl6(TeCl2)2, the Re6 cluster core is inscribed in a cube constructed of six μ3-Te2- and two μ3-Cl- ligands. The Re3+ cations bonded to four μ3-Te2- anions are also ligated by neutral TeCl2 ligands. In [Re6Te8(TeBr2)6]2+, the Re6 cluster core is inscribed in a cube constructed of eight μ3-Te2- ligands and each Re3+ cation is terminated by a neutral TeBr2 ligand.