beta-Bromostyrene Chemical Properties

Melting point:

7 °C(lit.)

Boiling point:

219-221 °C(lit.)

Density 

1.427 g/mL at 25 °C(lit.)

vapor pressure 

16.4Pa at 25℃

refractive index 

n20/D 1.608

Flash point:

215 °F

storage temp. 

2-8°C

solubility 

Soluble in alcohol.

form 

Liquid

color 

very deep green-yellow

Odor

at 1.00 % in dipropylene glycol. strong leafy green hyacinth

Odor Type

green

Water Solubility 

56.624mg/L at 25℃

BRN 

2038495

LogP

3.391 at 25℃

CAS DataBase Reference

103-64-0(CAS DataBase Reference)

NIST Chemistry Reference

Benzene, (2-bromoethenyl)-(103-64-0)

EPA Substance Registry System

.beta.-Bromostyrene (103-64-0)

Safety Information

Hazard Codes 

Xn

Risk Statements 

22

Safety Statements 

23-24/25-36/37

WGK Germany 

3

RTECS 

WL3850000

TSCA 

Yes

HS Code 

29039990

Hazardous Substances Data

103-64-0(Hazardous Substances Data)

Toxicity

An acute oral LD₅₀ in rats was reported as 1.25 ml/kg(0.82-189 ml/kg). The acute dermal LD₅₀ was reported as > 6 ml/kg in the rabbit

MSDS

• Language:English Provider:SigmaAldrich
• Language:English Provider:ACROS
• Language:English Provider:ALFA

beta-Bromostyrene Usage And Synthesis

Chemical Properties

CLEAR YELLOWISH TO BROWN LIQUID

Occurrence

Apparently has not been reported to occur in nature.

Uses

Perfumery.

Uses

Beta-Bromostyrene, cis + trans is an important raw material and intermediate used in organic Synthesis, pharmaceuticals, agrochemicals and dyestuff.

Uses

β-Bromostyrene was used in the one-pot method for the preparation of cinnamonitriles. It was also used in the preparation of pure ethyl Z- and E-α,α-difluoro-4-phenyl-3-butenoate and 1,3-diphenyl-1-butene. It may be used in the synthesis of β-tert-butylstyrene via cross coupling reaction with tert-butylmagnesium chloride in the presence of dichloro[1,1′-bis(diphenylphosphino)ferrocene]nickel(II) catalyst. It may also be used to prepare γ-but-2-enolactone by reacting with nickel carbonyl in the presence of alkynes.

Preparation

By the action of aqueous alkali on cinnamic acid dibromide.

General Description

β-Bromostyrene is an α,β-unsaturated aromatic halide. It can be synthesized by catalytic Hunsdiecker reaction (CHR) of cinnamic acid. It is commonly utilized as a precursor for preparing substituted alkenes, corresponding acetylenes and also in the total synthesis of natural compounds and antibiotics.

Flammability and Explosibility

Not classified

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