Strukturelle Vielfalt im pseudo‐ternären System M/Ge/I: α‐[NMe(nBu)3](GeI4)I, β‐[NMe(nBu)3](GeI4)I und [ImMe(nBu)][N(nBu)4](GeI4)3I2 |
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Authors: | Michael Wolff Claus Feldmann Prof Dr |
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Institution: | Institut für Anorganische Chemie, Universit?t Karlsruhe (TH), Engesserstraóe 15, 76131 Karlsruhe, Germany, Fax: +49‐721‐608‐4892 |
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Abstract: | By reaction of GeI4, N(nBu)4]I as iodide donor, and NMe(nBu)3]N(Tf)2] as ionic liquid, reddish‐black, plate‐like shaped crystals are obtained. X‐ray diffraction analysis of single crystals resulted in the compositions ;alpha;‐NMe(nBu)3](GeI4)I (Pbca; a = 1495.4(3) pm; b = 1940.6(4) pm; c = 3643.2(7) pm; Z = 16) and β‐NMe(nBu)3](GeI4)I (Pn; a = 1141.5(2) pm; b = 953.6(2) pm; c = 1208.9(2) pm; β = 100.8(1)°; Z = 2). Depending on the reaction temperature, the one or other compound is formed selectively. In addition, the reaction of GeI4 and N(nBu)4]I, using ImMe(nBu)]BF4] (Im = imidazole) as ionic liquid, resulted in the crystallization of ImMe(nBu)]N(nBu)4](GeI4)3I2 (P21/c; a = 1641.2(3) pm; b = 1903.0(4) pm; c = 1867.7(4) pm; β = 92.0(1)°; Z = 4). The anionic network of all three compounds is established by molecular germanium(IV)iodide, which is bridged by iodide anions. The different connectivity of (GeI4–I–) networks is attributed to the flexibility of I– regarding its coordination and bond length. Here, a 3+1]‐, 4‐ and 5‐fold coordination is first observed in the pseudo‐ternary system M/Ge/I (M: cation). |
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Keywords: | Germanium Iodine Ionic liquids Coordination modes Structure elucidation |
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