On the Chemical and Structural Rearrange of Hg-organyltellurolate Clusters: Synthesis, X-ray Characterization, TGA and Raman Evaluation of [(PhTe)6(Ph3P)2Hg5Cl4] · 2THF and [(PhTe)8Hg6Py2Cl4] · Py (Py = pyridine)

Abstract

(PhTe)2Hg reacts with HgCl2 and triphenylphosphine to give the clusters [(PhTe)6(Ph3P)2Hg5Cl4] · 2THF (1) and [(PhTe)8Hg6Py2Cl4] · Py (Py = pyridine) (2). In 1 each tellurium atom connects two Hg atoms, with Hg–Te distances around 2.75 A. Phosphorus atoms of the triphenylphosphine groups complete the tetrahedral coordination of the Hg1 atoms. The second set of Hg atoms (Hg2) is also coordinated to chlorine atoms. The three-dimensional assembling of 1 encloses circular channels with medium diameter of 12.5 A. The cluster 2 results from substitution of the oxidized triphenylphosphine ligands of 1 by one molecule of Hg(PhTe)2 in the course of the synthetic procedures. The alternated Te–Hg bonds of 2 close a 12-membered ring with two inverted 4-membered rings in the middle. Thermogravimetrical evaluations and Raman scattering lines of 1 and 2 are also discussed.