8.18631
Zinc bromide
anhydrous for synthesis
Synonym(s):
Zinc bromide, Zinc dibromide
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About This Item
Empirical Formula (Hill Notation):
Br2Zn
CAS Number:
Molecular Weight:
225.20
UNSPSC Code:
12352302
EC Index Number:
231-718-4
NACRES:
NA.22
MDL number:
Quality Level
form
crystals
pH
4 (20 °C in H2O, saturated solution)
bp
697 °C/1013 mbar
mp
394 °C
solubility
4470 g/L
density
4.2 g/cm3 at 20 °C
storage temp.
2-30°C
SMILES string
[Zn](Br)Br
InChI
1S/2BrH.Zn/h2*1H;/q;;+2/p-2
InChI key
VNDYJBBGRKZCSX-UHFFFAOYSA-L
Application
Zinc bromide can be used as:
It can also be used to prepare silica-supported zinc bromide (ZnBr2/SiO2) composite, which is used as a catalyst to synthesize:
- A catalyst to synthesize β-hydroxy ketones by stereoselective semipinacol rearrangement of α-hydroxy epoxides.
- A safe brominating source for the oxidative bromination of alkenes and alkynes in combination with lead tetraacetate.
It can also be used to prepare silica-supported zinc bromide (ZnBr2/SiO2) composite, which is used as a catalyst to synthesize:
- Ynone derivatives via cross-coupling reaction of acid chlorides with terminal alkynes.
- 4,5-disubstituted-1,2,3-(NH)-triazole derivatives by one-pot cross-coupling and 1,3-dipolar cycloaddition reaction of acid chlorides, terminal alkynes, and sodium azide.
Analysis Note
Assay (argentometric): ≥ 98.0 %
Water (K. F.): ≤ 2.0 %
Water (K. F.): ≤ 2.0 %
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signalword
Danger
Hazard Classifications
Acute Tox. 4 Oral - Aquatic Chronic 2 - Eye Dam. 1 - Skin Corr. 1B - Skin Sens. 1
wgk
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
hcodes
Storage Class
8B - Non-combustible corrosive hazardous materials
Certificates of Analysis (COA)
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Zinc bromide as catalyst for the stereoselective construction of quaternary carbon: improved synthesis of diastereomerically enriched spirocyclic diols
Tu Yong Qiang, et al.
Journal of the Chemical Society. Perkin Transactions 1, (22), 3791-3794 (2000)
One-pot synthesis of 4, 5-disubstituted 1, 2, 3-(NH)-triazoles by silica supported-zinc bromide in the aerobic condition
Keivanloo A, et al.
Comptes Rendus Chimie, 16(3), 239-243 (2013)
Silica-supported zinc bromide (ZnBr2/SiO2): a highly efficient heterogeneous catalyst for coupling acid chlorides with terminal alkynes
Keivanloo A, et al.
Tetrahedron Letters, 52(13), 1498-1502 (2011)