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Attainment of new TeII and TeIV iodides by unexpected removal of the mesityl group of [mesTeI2]−: Synthesis and structural features of [TeI4][Co(en)3]·I, [TeI6][Co(en)3]·I, [{TeI6}{Te2I10}][Co(NH3)6]2·2I·6H2O and [(mesTeI2)2(μ-I2)][Co(bpy)3]·I3·2CHCl3 (mes=2,4,6-trimetylphenyl; en=ethylenediamine; bpy=bipyridine)

2008; Elsevier BV; Volume: 28; Issue: 1 Linguagem: Inglês

10.1016/j.poly.2008.10.001

1873-3719

E. Faoro, Gelson Manzoni de Oliveira, Ernesto Schulz Lang,

Crystal Structures and Properties

(MesTe)2 reacts with I2 and [CoLn]I3 {L = (NH3)6, (en)3} in a biphasic system (chloroform and water) to give, in the interface of the two phases, crystals of [TeI4][Co(en)3] · I− (1), [TeI6][Co(en)3] · I− (2) and [{TeI6}{Te2I10}] [Co(NH3)6]2 · 2I− · 6H2O (3), in a high yield. If the crystallization is carried out with [Co(bpy)3]I3 under addition of THF, the mesityl groups are retained and the final product is [(mesTeI2)2(μ-I2)][Co(bpy)3] · I3- · 2CHCl3 (4), which crystallizes in the organic phase. The already known species {mesTeI⋯I(mes)Te−Te(mes)2} appears as subproduct in the syntheses of 1, 2 and 3, in the organic phase. The X-ray structural characterization of the new complexes is discussed, together with some synthetic features related with the abstraction of the mesityl groups in the three first syntheses.