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
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.008.552 Edit this at Wikidata
EC Number
  • 209-405-9
UNII
  • InChI=1S/C9H11Br/c1-6-4-7(2)9(10)8(3)5-6/h4-5H,1-3H3
    Key: RRTLQRYOJOSPEA-UHFFFAOYSA-N
  • CC1=CC(=C(C(=C1)C)Br)C
Properties
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]
GHS07: Exclamation mark
Warning
H315, H319, H335
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).

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

(CH3)3C6H3 Br2 → (CH3)3C6H2Br HBr

References

edit
  1. ^ "2-Bromomesitylene". pubchem.ncbi.nlm.nih.gov.
  2. ^ Farina, Vittorio; Krishnamurthy, Venkat; Scott, William J. (1997). "The Stille Reaction". Organic Reactions. pp. 1–652. doi:10.1002/0471264180.or050.01. ISBN 0471264180.
  3. ^ Lee Irvin Smith (1931). "Isoodurene". Org. Synth. 11: 66. doi:10.15227/orgsyn.011.0066.
  4. ^ Lee Irvin Smith (1931). "Bromomesitylene". Org. Synth. 11: 24. doi:10.15227/orgsyn.011.0024.