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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
Authors:Michael Wolff  Claus Feldmann Prof Dr
Institution:Institut für Anorganische Chemie, Universit?t Karlsruhe (TH), Engesserstraóe 15, 76131 Karlsruhe, Germany, Fax: +49‐721‐608‐4892
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).
Keywords:Germanium  Iodine  Ionic liquids  Coordination modes  Structure elucidation
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