Synthesis and structural aspects of 1-naphthyltellurium(IV) trichloride (1), bis(mesityl)tellurium(IV) dichloride (2) and bis(chlorobis(2-thiophenyl) tellurium)oxide (3)

摘要

Chlorination of bis(1-naphthyl)ditelluride (NplTeTeNpl; Npl = 1-C _(10)H_7) with 3 equiv. of sulfuryl chloride (SO _2Cl_2) resulted in bright yellow crystals of 1-naphthyltellurium(IV) trichloride (1-NplTeCl_3; 1). Bis(mesityl)tellurium(IV) dichloride, Mes_2TeCl_2, 2 (Mes = 2,4,6-Me_3C_6H_2) has been synthesized by the oxidative addition of sulfuryl chloride to bis(mesityl)telluride(II), prepared from detelluration of bis(mesityl)ditelluride with a freshly prepared electrolytic copper. Bis(chlorobis(2-thiophenyl)tellurium)oxide, (Tpn _2TeCl)_2O, _3 (Tpn = 2-C_4H_3S) have been obtained serendipitously as a product of reaction between bis(thiophenyl)tellurium(IV) dichloride (Tpn_2TeCl_2) and AgCN. All the three compounds 1-3 have been characterized crystallographically. In crystal lattice of 1, an asymmetric unit consists of two independent molecules and both the molecules form a separate polymeric zig-zag chains via l_2-chloro bridging. These two polymeric chains are interlinked via C-H···Cl H-bonding interactions to form a one dimensional supramolecular array. In case of 2 a dimeric unit has been realized through C-H···Cl H-bonding interaction while in 3 a one dimensional supramolecular array has been formed via intermolecular Te·· ·Cl1 secondary bonding interactions, where both the tellurium atoms exhibit φ-trigonal bipy-ramidal geometry.