Tris(diethyldithiocarbamato)(4-methoxyphenyl)tellurium(IV), p-MeOC6H4Te(S2CNEt2)3, and the Triclinic Modification of Tris(diethyldithiocarbamato)phenyltellurium(IV), PhTe(S2CNEt2)3

Abstract

The structures of the tellurium(IV) complexes [Te(C 5 H 10 NS 2 ) 3 (C 7 H 7 O)], (1), and [Te(C 5 H 10 NS 2 ) 3 (C 6 H 5 )], (2) (the triclinic modification), have been investigated. In both structures the coordination of the Te atom is distorted pentagonal bipyramidal, with four S atoms from two near symmetrically bidentate dithiocarbamate ligands [Te-S 2.62(1)-2.889(1)A] and a fifth S atom from the third unsymmetrically bidentate dithiocarbamate ligand [Te-S 2.585(1)-2.602(1)A] in equatorial positions. The aryl group is axial [Te-C 2.148 (5)-2.160(3)A]; the second axial position is occupied by the second S atom of the unsymmetrically bidentate dithiocarbamate ligand [Te...S 3.235(2)-3.241(1)A], the trans angle C-Te...S being 144.6-147.2(1)°. In the structure of (2), the two crystallographically independent molecules have different orientations of the ethyl groups in all three ligands and slightly differing phenyl group orientations.