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A12998 2,3-Dibromothiophene, 98+%

CAS Number
3140-93-0
Synonyms

Stock No. Size Price ($) Quantity Availability
A12998-03 1g 19.60
A12998-06 5g 62.90
A12998-14 25g 221.00
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2,3-Dibromothiophene, 98+%

MDL
MFCD00005418
EINECS
221-542-6

Chemical Properties

Formula
C4H2Br2S
Formula Weight
241.94
Boiling Point
215-216°
Flash Point
>100°(212°F)
Density
2.135
Refractive Index
1.6310
Storage & Sensitivity
Light Sensitive. Ambient temperatures.

Literature References

Lithiation with n-BuLi occurs selectively at the 2-position, giving e.g. on carboxylation, 3-bromothiophene-2-carboxylic acid in good yield: Synthesis, 327 (1980). With 2 eq. of n-BuLi the dilithio-derivative is obtained, providing a useful route to 2,3-disubstituted thiophenes: Synthesis, 545 (1972).

/n

Metallation with LDA at low temperature results, not in the expected 5-lithio-derivative, but in rearrangement to 2,4-dibromo-5-lithiothiophene, an example of the "base-catalyzed halogen dance": Synthesis, 771 (1989):

/n

/n

GHS Hazard and Precautionary Statements

Hazard Statements: H226-H301-H312-H315-H319-H332-H335

Flammable liquid and vapour. Toxic if swallowed. Harmful in contact with skin. Causes skin irritation. Causes serious eye irritation. Harmful if inhaled. May cause respiratory irritation.

Precautionary Statements: P210-P233-P235-P240-P241-P242-P243-P261-P264b-P270-P271-P280-P301+P310-P303+P361+P353-P304+P340-P305+P351+P338-P312-P330-P332+P313-P337+P313-P363-P370+P378q-P501c

Keep away from heat/sparks/open flames/hot surfaces. - No smoking. Keep container tightly closed. Keep cool. Ground/bond container and receiving equipment. Use explosion-proof electrical/ventilating/lighting/ equipment. Use only non-sparking tools. Take precautionary measures against static discharge. Avoid breathing dust/fume/gas/mist/vapours/spray. Wash face, hands and any exposed skin thoroughly after handling Do not eat, drink or smoke when using this product. Use only outdoors or in a well-ventilated area. Wear protective gloves/protective clothing/eye protection/face protection. IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician. IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Call a POISON CENTER or doctor/physician if you feel unwell. Rinse mouth. If skin irritation occurs: Get medical advice/attention. If eye irritation persists: Wash contaminated clothing before reuse. In case of fire: Use CO2, dry chemical, or foam Dispose of contents/ container to an approved waste disposal plant

Other References

Beilstein
107512
Hazard Class
3
Packing Group
III
Harmonized Tariff Code
2934.99
TSCA
No

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