Germanium dibromide

Germanium dibromide is a bromide of germanium with the chemical formula GeBr2.

Germanium dibromide
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.155.797
EC Number
  • 627-437-5
  • InChI=1S/Br2Ge/c1-3-2
    Key: DUVPPTXIBVUIKL-UHFFFAOYSA-N
  • Br[Ge]Br
Properties
Br2Ge
Molar mass 232.438 g·mol−1
Appearance white to pale yellow solid[1]
Melting point 120–125 °C[2]
143–144 °C (when heating rapidly)[1]
Hazards
GHS labelling:[3]
GHS05: Corrosive
Danger
H314
P260, P264, P280, P301+P330+P331, P302+P361+P354, P304+P340, P305+P354+P338, P316, P321, P363, P405, P501
Related compounds
Other anions
 Germanium difluoride
Germanium dichloride
Germanium diiodide
Other cations
 Tin dibromide
Lead dibromide
Related compounds
 Germanium tetrabromide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Preparation

Germanium dibromide can be obtained by reducing germanium tetrabromide with germanium or zinc.[4][1]

Properties

Germanium dibromide is a yellow-white solid that is soluble in ethanol and acetone. It disproportionates into germanium tetrabromide and germanium.[1][5] It hydrolyzes to germanium dihydroxide.[4] 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°.[6] It can react with cyclopentadienylsodium or cyclopentadienylthallium in ether solvent to form germanocene.[7]

References
  1. 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.
  2. Sigma-Aldrich Co., Germanium(II) bromide, 97%.
  3. "Germanium(II) bromide". pubchem.ncbi.nlm.nih.gov.
  4. Holleman, Arnold Frederik; Wiberg, Egon (2001), Wiberg, Nils (ed.), Inorganic Chemistry, translated by Eagleson, Mary; Brewer, William, San Diego/Berlin: Academic Press/De Gruyter, p. 959, ISBN 0-12-352651-5
  5. L. M. Dennis (1928-08-02), "Germanium. Zusammenfassung der Untersuchungen im Department of Chemistry, Cornell University, 1921-1927", Zeitschrift fÜr anorganische und allgemeine Chemie, vol. 174, no. 1, pp. 97–141, doi:10.1002/zaac.19281740114
  6. Roland C. Rouse, Donald R. Peacor, Bruce R. Maxim (1977-01-01), "The crystal structure of germanium dibromide*", Zeitschrift für Kristallographie - Crystalline Materials, vol. 145, no. 3–4, pp. 161–171, Bibcode:1977ZK....145..161R, doi:10.1524/zkri.1977.145.3-4.161, ISSN 2194-4946{{citation}}: CS1 maint: multiple names: authors list (link)
  7. John V. Scibelli, M. David. Curtis (February 1973). "Bis(.pi.-cyclopentadienyl)germanium(II)". Journal of the American Chemical Society. 95 (3): 924–925. doi:10.1021/ja00784a051. ISSN 0002-7863. Retrieved 2021-06-10.
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