Crystal and molecular structure of tetrakis-(phenylenethiourea)tellurium(II) perchlorate hexahydrate,C28H24N8O8S4Cl2Te·6H2O |
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Authors: | G C Rout M Seshasayee G Aravamudan S Sowrirajan |
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Institution: | (1) Department of Physics, Indian Institute of Technology, 600036 Madras, India;(2) Department of Chemistry, Indian Institute of Technology, 600036 Madras, India |
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Abstract: | The synthesis and structural characterization of the title compound, C28H24N8O8S4Cl2Te·6H2O are reported. The crystals are triclinic, space group P¯1 (No. 2), withZ=1 in a unit cell of dimensionsa=10.312(7),b=7.144(6),c=14.256(7) Å,=83.04(5),=92.15(5), and=101.25(6)°,V
c
=1022 Å3. The structure was solved by Fourier methods, and refined by full-matrix least squares toR=0.073 andR
w
=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. |
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