Mesityl bromide

Mesityl bromide is an organic compound with the formula (CH₃)₃C₆H₂Br. It is a derivative of mesitylene (1,3,5-trimethylbenzene) with one ring H replaced by Br. The compound is a colorless oil. It is a standard electron-rich aryl halide substrate for cross coupling reactions.^[2] With magnesium it reacts to give the Grignard reagent,^[3] which is used in the preparation of tetramesityldiiron.

Mesityl bromide

Names
Other names 2-bromomesitylene
Identifiers
CAS Number	576-83-0
3D model (JSmol)	Interactive image
ChemSpider	21112244
ECHA InfoCard	100.008.552
EC Number	209-405-9
PubChem CID	68473
UNII	X99GJ54YDY Y
CompTox Dashboard (EPA)	DTXSID4060363
InChI InChI=1S/C9H11Br/c1-6-4-7(2)9(10)8(3)5-6/h4-5H,1-3H3 Key: RRTLQRYOJOSPEA-UHFFFAOYSA-N
SMILES CC1=CC(=C(C(=C1)C)Br)C
Properties
Chemical formula	C9H11Br
Molar mass	199.091 g·mol−1
Appearance	colorless liquid
Density	1.3220 g/cm3
Melting point	−1 °C (30 °F; 272 K)
Boiling point	225 °C (437 °F; 498 K)
Hazards
GHS labelling:[1]
Pictograms
Signal word	Warning
Hazard statements	H315, H319, H335
Precautionary statements	P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P332+P313, P337+P313, P362, P403+P233, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

It is prepared by the direct reaction of bromine with mesitylene:^[4]

(CH₃)₃C₆H₃ + Br₂ → (CH₃)₃C₆H₂Br + HBr