Английская Википедия:Germanium(II) iodide

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Germanium(II) iodide is an iodide of germanium, with the chemical formula of GeI2.

Preparation

Germanium(II) iodide can be produced by reacting germanium(IV) iodide with hydriodic acid and hypophosphorous acid and water:[1]

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It can also be formed by the reaction of germanium monosulfide or germanium monoxide and hydrogen iodide.[1]

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It can also be produced from the direct reaction of germanium and iodine at 200 – 400 °C:[1]

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Germanium(II) iodide can also be formed from the decomposition of HGeI3, which can be prepared by reacting HGeCl3 with hydroiodic acid:[2]

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Properties

Germanium(II) iodide is a yellow crystal that slowly hydrolyzes into germanium(II) hydroxide in the presence of moisture. It is insoluble in hydrocarbons and slightly soluble in chloroform and carbon tetrachloride. It has a cadmium iodide structure with lattice parameters a = 413 pm and c = 679 pm.[1] It disproportionates to germanium and germanium tetraiodide at 550 °C.[3]

Applications

Germanium(II) iodide can react with carbene to form stable compounds.[4] It is also used in the electronics industry to produce germanium layers epitaxially through disproportionation reactions.[5]

References

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Шаблон:Germanium compounds Шаблон:Iodides

  1. 1,0 1,1 1,2 1,3 Georg Brauer (Hrsg.), unter Mitarbeit von Marianne Baudler u. a.: Handbuch der Präparativen Anorganischen Chemie. 3., umgearbeitete Auflage. Band I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6, S. 727.
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  3. Шаблон:Holleman&Wiberg
  4. Ошибка цитирования Неверный тег <ref>; для сносок Sigma не указан текст
  5. Шаблон:Citation