Crystal and molecular structure of tetrakis-(phenylenethiourea)tellurium(II) perchlorate hexahydrate, C<inf>28</inf>H<inf>24</inf>N<inf>8</inf>O<inf>8</inf>S<inf>4</inf>Cl<inf>2</inf>Te·6H<inf>2</inf>O

The synthesis and structural characterization of the title compound, C28H24N8O8S4Cl2Te·6H2O are reported. The crystals are triclinic, space group P-1 (No. 2), with Z=1 in a unit cell of dimensions a=10.312(7), b=7.144(6), c=14.256(7) Å, α=83.04(5), β=92.15(5), and γ=101.25(6)°, Vc=1022 Å3. The structure was solved by Fourier methods, and refined by full-matrix least squares to R=0.073 and Rw=0.077 for 1305 unique reflections. The tellurium atom in the molecule lies at a crystallographic center of symmetry, and is bonded to four phenylenethiourea sulfur atoms in a near square-planar arrangement with Te-S(1)=2.666(5), Te-S(2)=2.675(6) Å, and S(1)-Te-S(2)=88.7(3)°. The ligands behave as thiones. The crystal packing is stabilized by the extensive hydrogen bonding involving oxygen and nitrogen atoms. The Cl-O bond lengths are 1.29-1.36 Å and the O-Cl-O angles are 90-130° in the ClO4- moiety, and differ considerably from the normal values of 1.44 Å and 109°, respectively. © 1985 Plenum Publishing Corporation.