Synthese und Kristallstruktur von [Na(15-Krone-5)]4[Cd4Te12] · 8 DMF

Synthesis and Crystal Structure of Na(15-Crown-5)]₄Cd₄Te₁₂] · 8 DMF The title compound has been prepared by reaction of Na₂Te₃ with cadmium acetate in DMF solution in the presence of 15-crown-5, forming black crystal needles, which were characterized by an X-ray structure determination. Space group P2₁/n, Z = 2, 5 716 observed unique reflections, R = 0.038. Lattice dimensions at ?50°C: a = 1 622.9, b = 2 038.2, c = 1 739.8 pm, β = 92.26°. The compound has an ionic structure. The cations Na(15-crown-5)(DMF)]⁺ and Na(15-crown-5) · (DMF)₂]⁺ together with two further DMF molecules form tetrameric units. In the centrosymmetric anions Cd₄Te₁₂]^4? the cadmium atoms are linked by μ₂-Te^2?-, μ₄-Te₂^2?-, and μ₂-Te₃^2?-units.