New cation-dependent supramolecular arrangements of [RTeI4](-) tectons: Synthesis and X-ray structural characterization of the mixed valence complex salts [p-CH3O(C6H4)Te(etu)]-[p-CH3O(C6H4)TeI4] (etu = ethylenethiourea) and [p-PhO(C6H4)Te(tu)][p-PhO

摘要

(p-CH3OC6H4Te)(2) and (p-PhOC6H4Te)(2) react with I-2 and thiourea/ethylenethiourea to give the mixed valence complex salts [p-CH3O(C6H4)Te(etu)][p-CH3O(C6H4)TeI4] (1) and [p-PhO(C6H4)Te(tu)][p-PhO(C6H4)TeI4] (2). Both compounds confirm the tectonic character of the tetraiodo-organyltellurates [RTeI4](-) with the assembling of polymeric chains of [p-CH3O(C6H4)TeI4](2)(2-) and dimers linked through single (1) and double (2) (II)-I-. . . secondary bonds. The strong covalent character of the cat [p-CH3O(C6H4)TeI4](2)(2-) ion-anion interaction of 2 allows its further representation as the mixed valence molecular species [RTeI3(mu(-1))Te(tu)R] {R = p-PhO(C6H4)}. (c) 2006 Elsevier B.V. All rights reserved.