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首页> 外文期刊>Zeitschrift fur Anorganische und Allgemeine Chemie >Synthesis of Metastable Si~(II)X_2 Solutions (X = F, Cl). A Novel Binary Halide for Synthesis
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Synthesis of Metastable Si~(II)X_2 Solutions (X = F, Cl). A Novel Binary Halide for Synthesis

机译:亚稳Si〜(II)X_2溶液的合成(X = F,Cl)。一种新型的合成二卤化物

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摘要

Thermodynamic data for gaseous SiF_2 and SiCl_2 known from literature show that these binary subhalides are formed nearly quantitatively at 1376 °C and 1076 °C, respectively, as products of the reaction of elemental silicon with SiF_4 or SiCl_4 at 1×10~(–2) mbar. Applying the co-condensation technique SiF2 as well as SiCl_2 can be trapped at –196 °C and prepared in synthetic scale. Herein, first analysis of metastable SiF_2 and SiCl_2 solutions are presented, showing that SiF_2 is more reactive than SiCl_2 leading to compounds of low boiling point of so far unknown composition. The metastable SiCl_2 solution can be used as a SiCl_2 source, which is shown by the trapping reaction with Idipp [Idipp = 1,3-bis(2,6-iPr_2-C_6H_3)imidazol-2-ylidene] leading to Idipp-SiCl_2. The reactivity of the solution might be fine-tuned by changing the donor opening the door for further applications.
机译:文献中已知的气态SiF_2和SiCl_2的热力学数据表明,这些二元亚卤化物分别在1376°C和1076°C下定量形成,是元素硅与SiF_4或SiCl_4在1×10〜(–2 )毫巴。采用共冷凝技术,SiF2和SiCl_2可以在–196°C下捕获并以合成规模制备。在此,首先对亚稳的SiF_2和SiCl_2溶液进行了分析,结果表明SiF_2比SiCl_2具有更高的反应活性,从而导致迄今未知的低沸点化合物。亚稳态的SiCl_2溶液可以用作SiCl_2源,其通过与Idipp [Idipp = 1,3-bis(2,6-iPr_2-C_6H_3)咪唑-2-亚基]的诱捕反应而显示,从而导致Idipp-SiCl_2。溶液的反应性可以通过改变供体打开门以进一步应用而进行微调。

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