ABSTRACT
During the synthesis of a series of square-planar [TeCl2(stu)2] complexes, where stu represents bulky di- or tetrasubstituted thioureas, the title compound, [TeCl[(C6H11NH)2CS]3]Cl or C39H72ClN6S3Te+*Cl-, was the unexpected result when stu was N,N'-dicyclohexylthiourea. The complex is square planar, with Te-S distances of 2.5803 (4), 2.6211 (4) and 2.8214 (4) A, and a Te-Cl distance of 2.6485 (4) A, indicating a small trans influence of the thiourea ligand.
ABSTRACT
The structure of the title compound, [TeCl(4)(C(5)H(10)N(2)S)(2)] or C(10)H(20)Cl(4)N(4)S(2)Te, has been solved in order to study the stereochemical activity of the lone pair of electrons on Te(IV). The two crystallographically independent molecules in the asymmetric unit both show a distorted octahedral coordination of the Te atom. The two Te-S bonds are trans to each other in both molecules and are greatly asymmetric, with bond lengths of 2.5686 (7) versus 2.8557 (8) A and 2.5859 (7) versus 2.8165 (9) A. The Te-Cl bond lengths lie in the range 2.5236 (7)-2.5589 (8) A. The asymmetric Te-S bonds and a large S-Te-Cl angle of ca 97 degrees involving the long Te-S bonds indicate stereochemical activity of the lone pair of electrons on Te.
