 | |
| Names | |
|---|---|
| IUPAC name tetrabromogermane | |
| Identifiers | |
3D model (JSmol) | |
| ChemSpider | |
| ECHA InfoCard | 100.033.270 |
| EC Number |
|
| |
| |
| Properties | |
| Br4Ge | |
| Molar mass | 392.246 g·mol−1 |
| Appearance | Colorless solid |
| Density | 2.123 g/cm3 |
| Melting point | 26 °C (79 °F; 299 K) |
| Boiling point | 185.9 °C (366.6 °F; 459.0 K) |
| Hazards | |
| GHS labelling: | |
 | |
| Danger | |
| H314 | |
| P260,P264,P280,P301+P330+P331,P303+P361+P353,P304+P340,P305+P351+P338,P310,P321,P363,P405,P501 | |
| Structure[1] | |
| α-Cubic (SnI4 type) β-Monoclinic (SnBr4 type) | |
| Thermochemistry | |
Std enthalpy of formation(ΔfH⦵298) | 83.3 kcal/mol |
| Related compounds | |
Otheranions | Germanium tetrafluoride Germanium tetrachloride Germanium tetraiodide |
Othercations | Carbon tetrabromide Silicon tetrabromide Tin(IV) bromide |
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa). | |
Germanium tetrabromide is theinorganic compound with the formula GeBr4. It is a colorless solid that melts near room temperature. It can be formed by treating solidgermanium withbromine, or by treating a germanium-copper mixture with bromine:[2]
From this reaction, GeBr4 has aheat of formation of 83.3 kcal/mol.[3]
The compound is liquid at 25 °C, and forms an interlocking liquid structure.[4] From room temperature down to −60 °C the structure takes on a cubic α form, whereas at lower temperatures it takes on a monoclinic β form.
