Arsenic (III) bromide

Structural formula
General
Surname	Arsenic (III) bromide
other names	Arsenic (III) bromide; Arsenic tribromide; Arsenum bromatum;
Molecular formula	AsBr 3
Brief description	white to yellowish solid
External identifiers / databases
EC number	232-057-4
ECHA InfoCard	100.029.143
PubChem	24569
Wikidata	Q425073
properties
Molar mass	314.65 g mol −1
Physical state	firmly
density	3.40 g cm −3
Melting point	31.1 ° C
boiling point	221 ° C
Vapor pressure	1.33 mbar (41.8 ° C)
solubility	Decomposes in water; as a liquid miscible with ethanol and benzene;
safety instructions
H and P phrases	H: 331-301-410
	P: 261-264-270-271-273-301 + 310-304 + 340-311-321-330-391-403 + 233-405-501
Thermodynamic properties
ΔH f 0	−197.5 kJ / mol
	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.

{\ displaystyle \ mathrm {2 \ As + 3 \ Br_ {2} \ longrightarrow 2 \ AsBr_ {3}}}

It is also possible to display it by reacting arsenic (III) oxide with sulfur and bromine .

{\ displaystyle \ mathrm {2 \ As_ {2} O_ {3} +3 \ S + 6 \ Br_ {2} \ longrightarrow 4 \ AsBr_ {3} +3 \ SO_ {2}}}

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) . Template: room group / 19

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 .

[GESTIS-1] ↑ ^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) .

[Hager-2] 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).

[3] Landolt Börnstein: Arsenic tribromide

[CRC90_5_5-4] 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.

[HoWi-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.

[brauer-6] 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.

[7] 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 .