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Germanium(II) Bromide
Germanium dibromide is a bromide of germanium with the chemical formula GeBr2. Preparation Germanium dibromide can be obtained by reducing germanium tetrabromide with germanium or zinc.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. 724. :Ge + GeBr4 -> 2GeBr2 Properties Germanium dibromide is a yellow-white solid that is soluble in ethanol and acetone. It disproportionates into germanium tetrabromide and germanium. It hydrolyzes to germanium dihydroxide. Germanium dibromide is monoclinic, space group P21/c (No. 14), lattice parameters a = 11.68 Å, b = 9.12 Å, c = 7.02 Å, and β = 101.9°. It can react with cyclopentadienylsodium or cyclopentadienylthallium in ether solvent to form germanocene. References {{Bromides Germanium compounds Bromides ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Germanium Difluoride
Germanium difluoride (GeF2) is a chemical compound of germanium and fluorine. It is a white solid with a melting point of 110 °C, and can be produced by reacting germanium tetrafluoride with germanium powder at 150–300 °C. Structure Germanium difluoride forms orthorhombic crystals with a space group P212121 (No. 19), Pearson symbol oP12, and lattice constants a = 0.4682 nm, b = 0.5178 nm, c = 0.8312 nm, Z = 4 (four structure units per unit cell). Its crystal structure is characterized by strong polymeric chains composed by GeF3 pyramids. One of the fluorine atom in the pyramid is shared by two neighboring chains, providing a weak link between them. Another, less common crystal form of GeF2 has tetragonal symmetry with a space group P41212 (No. 92), Pearson symbol The Pearson symbol, or Pearson notation, is used in crystallography as a means of describing a crystal structure, and was originated by W. B. Pearson. The symbol is made up of two letter ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |