Synthese und Kristallstruktur von TlI3(3-CH3C5H4NO)2, einem Komplex des dreiwertigen Thalliums / Synthesis and Crystal Structure of TlI3(3-CH3C5H4NO)2, a Complex of Trivalent Thallium

Abstract

TlI3(CH3C5H4NO)2 is obtained in acetonitrile by the reaction of TlI with iodine and 3-methyl- pyridine-N-oxide. It crystallizes monoclinic in the centrosymmetric space group C2/c with lattice parameters at 190 K, a = 1756.5(8), b = 780.7(5), c = 1397.1(4) pm, β = 110.26(3)° and Z = 4. The structure consists of monomeric complexes, in which the Tl atom shows a fivefold coordina­tion in form of a slightly distorted trigonal bipyramid, the I atoms being located in the equatorial plane. The symmetry of the complex is C2 whereby the Tl atom and one of the I atoms occupy the twofold axis.