228859-58-3Relevant academic research and scientific papers
Compounds of Group 14 Elements with an Element-Element (E = Si, Ge, Sn) Bond: Effect of the Nature of the Element Atom
Zaitsev, Kirill V.,Lermontova, Elmira Kh.,Churakov, Andrei V.,Tafeenko, Viktor A.,Tarasevich, Boris N.,Poleshchuk, Oleg Kh.,Kharcheva, Anastasia V.,Magdesieva, Tatiana V.,Nikitin, Oleg M.,Zaitseva, Galina S.,Karlov, Sergey S.
, p. 2765 - 2774 (2015/06/30)
Two series of germanium compounds, (p-Tol)3Ge-MMe3 (M = Si (1), Ge (2), Sn (3)) and (Me3Si)3Ge-MPh3 (M = Ge (4), Sn (5)), were prepared using lithium or potassium intermediates. The changing of the reaction conditions results in trigermane Ph3Ge-Ge(SiMe3)2-GePh3 (6). The molecular structures of 1, 2, and 6 were investigated by X-ray analysis. By UV/visible spectroscopy it is established that introduction of a tin atom results in a significant bathochromic absorption shift. Furthermore, according to cyclic voltammetry, oxidation potentials decrease in the order 1 > 2 > 3. The electronic structures of 1-4 and related (Me3Si)3Ge-SiPh3 were investigated by DFT calculations. Fluorescence properties of 1-3 were studied in the solid state and in solution; for compound 3 phosphorescence (lifetime is 4.58 ms) is observed in the solid state. (Graph Presented).
Reactions of LiE(SiMe3)3, E = Si, Ge: X-ray Crystal Structure of the Cyclotetrastannane [ClSnSi(SiMe3)3]4
Mallela, S. P.,Saar, Yochen,Hill, Sven,Geanangel, R. A.
, p. 2957 - 2960 (2008/10/08)
Reaction of SnCl2.dioxane with 2 equiv of Li(THF)3Si(SiMe3)3 in hexane afforded the cyclotetrastannane [(Me3Si)3SiSnCl]4 in reasonable yield. From pentane, the product crystallized as a red-orange disolvate in the P1- space group (triclinic) with a = 14.735(2) ?, b = 14.976(2) ?,c = 24.066(3) ?, α = 76.94°, β = 76.19°, . gamma. = 62.11°, V = 4517.5 ?**3, and Z = 2. The Sn4 ring consisted of a slightly distorted, nonplanar (fold angle = 18.9°) rectangle with Sn-Sn distances of 2.8054(6), 2.8111(6), 2.9122(6), and 2.9146(6) ?. The pentane molecules were disordered. Selected mono- and dihalogermanes were treated with 1 equiv of Li(THF)3Si(SiMe3)3 or Li(THF)2.5Ge(SiMe3)3, affording (Me3Si)3EGe(CF3)3 (E = Si, Ge) and (Me3Si)3GeGeR3 (R = Cl, CH3, C6H5). Besides the monosubstitution product, the reaction of GeCl4 with 1 equiv of Li(THF)2.5Ge(SiMe3)3 also gave a small amount of the linear tetragermane (Me3Si)3GeGeCl2GeCl2Ge(SiMe3)3. Good yields of the analogous phenyl derivative, (Me3Si)3GeGePh2GePh2Ge(SiMe3)3, were obtained by treating Ph2GeCl2 with 2 equiv of the lithium-germyl reagent.
