Boron triiodide

Structural formula
General
Surname	Boron triiodide
other names	Triiodoborane
Molecular formula	BI 3
Brief description	colorless solid
External identifiers / databases
EC number	236-857-4
ECHA InfoCard	100,033,492
PubChem	83546
Wikidata	Q420944
properties
Molar mass	391.52 g mol −1
Physical state	firmly
density	3.35 g cm −3
Melting point	49.9 ° C
boiling point	209.5 ° C
solubility	almost insoluble in water; soluble in carbon disulfide;
safety instructions
GHS labeling of hazardous substances danger
H and P phrases	H: 314
	P: 280-305 + 351 + 338-310
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Boron triiodide is a chemical compound from the group of boron - halogen compounds or inorganic iodine compounds .

Extraction and presentation

Boron triiodide can be obtained by the reaction of lithium borohydride with iodine, whereby lithium iodide , hydrogen and hydrogen iodide are formed in addition to boron triiodide .

{\ displaystyle \ mathrm {3 \ LiBH_ {4} +8 \ I_ {2} \ rightarrow 3 \ LiI + 3 \ BI_ {3} +4 \ H_ {2} +4 \ HI}}

properties

In the pure state, boron triiodide forms colorless, otherwise reddish, shiny crystals that are sensitive to air and hydrolysis and have a hexagonal crystal structure (a = 699.09 ± 0.02 pm, c = 736.42 ± 0.03 pm, space group P 6 ₃ / m (room group no. 176) ). Boron triiodide is a strong Lewis acid and is soluble in carbon disulfide . Template: room group / 176

Boron triiodide reacts with water to form boric acid and hydriodic acid :

{\ displaystyle \ mathrm {BI_ {3} +3 \ H_ {2} O \ \ rightleftharpoons \ B (OH) _ {3} +3 \ HI}}

use

Boron triiodide can be used for the production of other chemical compounds and as a catalyst (for example in coal liquefaction).

Individual evidence

↑ ^a ^b ^c ^d Georg Brauer (Ed.), With the collaboration of Marianne Baudler a . a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume II, Ferdinand Enke, Stuttgart 1978, ISBN 3-432-87813-3 .
↑ ^a ^b ^c ^d data sheet Boron triiodide, 95% from Sigma-Aldrich , accessed on December 1, 2019 ( PDF ).
↑ ^a ^b Lide, DR, ed. (2005), CRC Handbook of Chemistry and Physics (86th ed.), Boca Raton (FL): CRC Press, ISBN 0-8493-0486-5 .
↑ Bernd Stange: Contributions to the chemistry of boron-nitrogen compounds ( Memento from September 23, 2010 in the Internet Archive ) (PDF; 1.2 MB), dissertation University of Bochum 2001.
↑ Barbara Albert, Konny Schmitt: The crystal structure of boron triiodide, BI ₃ . In: Journal for inorganic and general chemistry , Volume 627 Issue 5, pp. 809-810; doi : 10.1002 / 1521-3749 (200105) 627: 5 <809 :: AID-ZAAC809> 3.0.CO; 2-J .
↑ Thorsten Harald Klawonn: Low molecular organometallic gelators deoxyamino sugar carbene complexes and cholesterol titanocene , dissertation University of Bonn, 2008 DNB 991806476/34 .
↑ Hydrogenation in the presence of borane and iodine catalysts paves the way for the liquefaction of lean coal (innovations report)

Web links

Entry on boron triiodide . In: P. J. Linstrom, W. G. Mallard (Eds.): NIST Chemistry WebBook, NIST Standard Reference Database Number 69 . National Institute of Standards and Technology , Gaithersburg MD

[Brauer-1] Georg Brauer (Ed.), With the collaboration of Marianne Baudler a . a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume II, Ferdinand Enke, Stuttgart 1978, ISBN 3-432-87813-3 .

[sigma-2] ta sheet Boron triiodide, 95% from Sigma-Aldrich , accessed on December 1, 2019 ( PDF ).

[CRC-3] Lide, DR, ed. (2005), CRC Handbook of Chemistry and Physics (86th ed.), Boca Raton (FL): CRC Press, ISBN 0-8493-0486-5 .

[4] Bernd Stange: Contributions to the chemistry of boron-nitrogen compounds ( Memento from September 23, 2010 in the Internet Archive ) (PDF; 1.2 MB), dissertation University of Bochum 2001.

[5] Barbara Albert, Konny Schmitt: The crystal structure of boron triiodide, BI ₃ . In: Journal for inorganic and general chemistry , Volume 627 Issue 5, pp. 809-810; doi : 10.1002 / 1521-3749 (200105) 627: 5 <809 :: AID-ZAAC809> 3.0.CO; 2-J .

[6] Thorsten Harald Klawonn: Low molecular organometallic gelators deoxyamino sugar carbene complexes and cholesterol titanocene , dissertation University of Bonn, 2008 DNB 991806476/34 .

[7] Hydrogenation in the presence of borane and iodine catalysts paves the way for the liquefaction of lean coal (innovations report)