Zirconium (IV) bromide

Crystal structure
__ Zr 4+      __ Br -
General
Surname	Zirconium (IV) bromide
other names	Zirconium tetrabromide
Ratio formula	ZrBr 4
Brief description	white solid
External identifiers / databases
CAS number 13777-25-8 EC number 237-417-4 ECHA InfoCard 100.034.002 PubChem 83727 ChemSpider 75549 Wikidata Q2348790
properties
Molar mass	410.84 g mol −1
Physical state	firmly
density	4.201 g cm −3
Melting point	≥450 ° C (under pressure)
solubility	decomposes in water
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 .

Zirconium (IV) bromide is an inorganic chemical compound of zirconium from the group of bromides .

Extraction and presentation

Zirconium (IV) bromide can be obtained by brominating zirconium with bromine at 380 ° C.

${\displaystyle \mathrm {Zr+2\ Br_{2}\longrightarrow ZrBr_{4}} }$

It is also possible to produce it by reacting zirconium (IV) oxide with carbon and bromine.

${\displaystyle \mathrm {ZrO_{2}+2\ C+2\ Br_{2}\longrightarrow ZrBr_{4}+2\ CO} }$

properties

Zirconium (IV) bromide is a white solid. When exposed to water , it completely hydrolyzes to zirconium oxybromide. Its crystal structure corresponds to that of tin (IV) iodide with the space group Pa 3 (space group no. 205) . It sublimes at 357 ° C.

use

By reduction with zirconium or aluminum can zirconium (III) bromide are obtained.

${\displaystyle \mathrm {3\ ZrBr_{4}+Zr\longrightarrow 4\ ZrBr_{3}} }$

${\displaystyle \mathrm {3\ ZrBr_{4}+Al\longrightarrow 3\ ZrBr_{3}+AlBr_{3}} }$

Individual evidence

1. ↑ ^{a b} Roger Blachnik (Ed.): Pocket book for chemists and physicists . Volume III: Elements, Inorganic Compounds and Materials, Minerals . founded by Jean d'Ans, Ellen Lax. 4th, revised and revised edition. Springer, Berlin 1998, ISBN 3-540-60035-3 , pp. 818 f . ( limited preview in Google Book search).
2. ↑ ^{a b c d e f} data sheet Zirconium (IV) bromide, anhydrous, 99.99% trace metals basis from Sigma-Aldrich , accessed on May 4, 2013 ( PDF ).
3. ↑ ^{a b} Georg Brauer (Ed.), With the collaboration of Marianne Baudler u a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume II, Ferdinand Enke, Stuttgart 1978, ISBN 3-432-87813-3 , p. 1358.
4. ↑ 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 , pp. 1354ff.