\u3cem\u3ecis\u3c/em\u3e-(Diethyldithiocarbamato)diiodo(phenyl)tellurium(IV), PhTe(S\u3csub\u3e2\u3c/sub\u3eCNEt\u3csub\u3e2\u3c/sub\u3e)I\u3csub\u3e2\u3c/sub\u3e, and its Methoxy-Substituted Mixed Br/1 Analogue \u3cem\u3ecis\u3c/em\u3e-Bis(0.4-bromo/0.6-iodo)-(diethyldithiocarbamato)(4-methoxyphenyl) tellurium(IV), \u3cem\u3ep\u3c/em\u3e-MeOC\u3csub\u3e6\u3c/sub\u3eH\u3csub\u3e4\u3c/sub\u3eTe(S\u3csub\u3e2\u3c/sub\u3e CNEt\u3csub\u3e2\u3c/sub\u3e)(Br\u3csub\u3e0.4\u3c/sub\u3eI\u3csub\u3e0.6\u3c/sub\u3e)\u3csub\u3e2\u3c/sub\u3e

Abstract

The TeIV complexes PhTe(S2CNEt2)I2, (1), and p-MeOC6H4Te(S2CNEt2)Br0.4/I0.6) 2, (2), have been synthesized by reacting PhTeI3 with NaS2CNEt2, and p-MeOC6H4Te(S2CNEt2)2I with Br2, respectively. In (2), both I atoms are partially replaced by Br atoms in a 3:2 ratio. The structures display distorted octahedral Te coordination with two symmetrically coordinated S atoms [Te—S 2.550 (2)—2.569 (2) Å in three independent molecules of (1) and 2.523 (1) Å in (2)] and with two cis-disposed halogen atoms [Te—I 2.941 (1)—2.986 (1) Å in (1) and 3.003 (4) and 3.049 (3) Å in (2); Te—Br 2.962(8) and 2.967 (8) Å in (2)] in equatorial positions. The aryl group is axial in both complexes [Te—C 2.137(6)—2.146(6) and 2.123(5) Å in (1) and (2) respectively] and the second axial position is occupied by a halogen atom of a neighbouring molecule [Te⋅⋅⋅I 3.898(1)—4233(1) Å in (1); Te⋅ ⋅ ⋅I3872(3) Å and Te⋅ ⋅ ⋅Br 3.676(6) Å in (2); trans angles C---Te⋅ ⋅ ⋅ (Br) 153.4(2)—177.7(2)°] so that the molecules are joined into (quasi)centrosymmetric pairs by these secondary interactions