Germanium dibromide
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| Identifiers | |
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3D model (JSmol)
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| ChemSpider | |
| ECHA InfoCard | 100.155.797 |
| EC Number |
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PubChem CID
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| 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] | |
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| 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
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Germanium difluoride Germanium dichloride Germanium diiodide |
Other cations
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Tin dibromide Lead dibromide |
Related compounds
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Germanium tetrabromide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Germanium dibromide is a bromide of germanium with the chemical formula GeBr2.
Preparation
[edit]Germanium dibromide can be obtained by reducing germanium tetrabromide with germanium or zinc.[4][1]
Properties
[edit]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
[edit]- ^ a b c d 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.
- ^ Sigma-Aldrich Co., Germanium(II) bromide, 97%.
- ^ "Germanium(II) bromide". pubchem.ncbi.nlm.nih.gov.
- ^ a b 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
- ^ 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
- ^ 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) - ^ 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.