3,4-DICHLOROSTYRENE Chemical Properties

Melting point:

48.5°C (estimate)

Boiling point:

230.44°C (rough estimate)

Density 

1.2560

refractive index 

1.5857 (estimate)

storage temp. 

under inert gas (nitrogen or Argon) at 2-8°C

Appearance

Colorless to light yellow Liquid

Safety Information

HS Code 

2902900000

3,4-DICHLOROSTYRENE Usage And Synthesis

Chemical Properties

clear colorless to yellow liquid

Synthesis

3,4-Dichlorobenzaldehyde (5.0 g, 28.60 mmol), methyltriphenylphosphonium bromide (20.40 g, 57.20 mmol), and potassium carbonate (9.90 g, 71.50 mmol) were used as raw materials, which were dissolved in 110 mL of a solvent mixture of dioxane and water (V/V = 10:1). The reaction mixture was heated to 95 °C and the reaction was stirred at this temperature for 12 hours. Upon completion of the reaction, the organic phases were combined and washed with saturated sodium chloride solution (50 mL x 3) and subsequently dried over anhydrous sodium sulfate. The dried organic phase was filtered and the filtrate was concentrated under reduced pressure. The resulting residue was purified by column chromatography using eluent system B as eluent, and the target product 1,2-dichloro-4-vinylbenzene (4.0 g, colorless liquid) was finally obtained in 80.9% yield.

References

[1] Patent: CN103030646, 2016, B. Location in patent: Paragraph 0924; 0926-0929

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