Arsenic (III) bromide
Structural formula | ||||||||||||||||
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General | ||||||||||||||||
Surname | Arsenic (III) bromide | |||||||||||||||
other names |
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Molecular formula | AsBr 3 | |||||||||||||||
Brief description |
white to yellowish solid |
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properties | ||||||||||||||||
Molar mass | 314.65 g mol −1 | |||||||||||||||
Physical state |
firmly |
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density |
3.40 g cm −3 |
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Melting point |
31.1 ° C |
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boiling point |
221 ° C |
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Vapor pressure |
1.33 mbar (41.8 ° C) |
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solubility |
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safety instructions | ||||||||||||||||
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Thermodynamic properties | ||||||||||||||||
ΔH f 0 |
−197.5 kJ / mol |
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As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . |
Arsenic (III) bromide is a chemical compound from the group of arsenic compounds and bromides .
Extraction and presentation
Arsenic (III) bromide can be generated directly from the elements.
It is also possible to display it by reacting arsenic (III) oxide with sulfur and bromine .
properties
Arsenic (III) bromide is a white to yellowish, deliquescent, non-flammable solid. It reacts with water to form a caustic, poisonous mixture of hydrobromic acid and arsenic acid , which becomes visible as a white mist. It forms tetrahalogen complexes AsBr 4 - and has an orthorhombic crystal structure ( space group P 2 1 2 1 2 1 (space group no.19 ) , lattice parameters a = 10.24 Å , b = 12.15 Å, c = 4.32 Å) .
use
Arsenic (III) bromide is used in homeopathy.
Individual evidence
- ↑ a b c d e f g h Entry for CAS no. 7784-33-0 in the GESTIS substance database of the IFA , accessed on December 19, 2011(JavaScript required) .
- ↑ a b c Margitta Albinus: Hager's Manual of pharmacy practice: substances E - O . Springer, 1994, ISBN 978-3-540-52688-9 ( page 296 in the Google book search).
- ↑ Landolt Börnstein: Arsenic tribromide
- ↑ David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 90th edition. (Internet version: 2010), CRC Press / Taylor and Francis, Boca Raton, FL, Standard Thermodynamic Properties of Chemical Substances, pp. 5-5.
- ^ A b A. F. Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 91st – 100th, improved and greatly expanded edition. Walter de Gruyter, Berlin 1985, ISBN 3-11-007511-3 , p. 801.
- ↑ Georg Brauer (Ed.), With the collaboration of Marianne Baudler a . a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 574.
- ↑ AK Singh, S. Swaminathan: Refinement of the Crystal Structure of Arsenic tribromide. In: Zeitschrift für Kristallographie, Kristallgeometrie, Kristallphysik, Kristallchemie , 124, 1967, pp. 375-377, doi : 10.1524 / zkri.1967.124.16.375 .