Niobium (V) bromide
Structural formula | ||||||||||||||||
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General | ||||||||||||||||
Surname | Niobium (V) bromide | |||||||||||||||
other names |
Niobium pentabromide |
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Molecular formula | NbBr 5 | |||||||||||||||
Brief description |
black solid |
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External identifiers / databases | ||||||||||||||||
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properties | ||||||||||||||||
Molar mass | 412.5 g mol −1 | |||||||||||||||
Physical state |
firmly |
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density |
4.36 g cm −3 |
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Melting point |
265 ° C |
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boiling point |
361 ° C |
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solubility |
soluble in alcohol |
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safety instructions | ||||||||||||||||
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As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . |
Niobium (V) bromide is an inorganic chemical compound of niobium from the group of bromides .
Extraction and presentation
Niobium (V) bromide can be obtained by reacting niobium with bromine .
properties
Niobium (V) bromide is an extremely moisture-sensitive red solid that is readily soluble in ethanol . Three modifications are known. The α- and β-forms have orthorhombic crystal structures with the space groups Pbma (No. 57, position 5) and Ccmm (No. 63, position 2) . The third form has a triclinic crystal structure with the space group P 1 (No. 2) . This is isotype with the triclinic form of niobium (V) iodide .
Individual evidence
- ↑ a b c d e f g Georg Brauer (Ed.) U. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume III, Ferdinand Enke, Stuttgart 1981, ISBN 3-432-87823-0 , p. 1444.
- ↑ a b Datasheet Niobium (V) bromide, 98% from Sigma-Aldrich , accessed on November 5, 2019 ( PDF ).
- ↑ S. Tragl and H.-J. Meyer: Crystal structure of niobium pentabromide, NbBr 5 , a triclinic phase. In: Zeitschrift für Kristallographie - New Crystal Structures , 222, 2007, pp. 161–162, doi : 10.1524 / ncrs.2007.0066