1723-34-8

Basic information

• Product Name: 3-methylthieno[2,3-b]thiophene
• Synonyms: Thieno(2,3-b)thiophene, 3-methyl-
• CAS NO: 1723-34-8
• Molecular Formula: C₇H₆S₂
• Molecular Weight: 154.2525
• Mol File: 1723-34-8.mol
• Article Data: 1

Chemical Properties

• Boiling Point: 245.7°C at 760 mmHg
• Flash Point: 73.7°C
• Density: 1.298g/cm³
• Vapor Pressure: 0.0444mmHg at 25°C
• Refractive Index: 1.695
• CAS DataBase Reference: 3-methylthieno[2,3-b]thiophene(CAS DataBase Reference)
• NIST Chemistry Reference: 3-methylthieno[2,3-b]thiophene(1723-34-8)
• EPA Substance Registry System: 3-methylthieno[2,3-b]thiophene(1723-34-8)

Safety Data

• Hazardous Substances Data: 1723-34-8(Hazardous Substances Data)

Upstream product

• 96-43-5 2-thienyl chloride 
• 33922-80-4 bis-(1-propenyl) sulfide 

Relevant articles and documents

HIGH-TEMPERATURE ORGANIC SYNTHESIS XXXV. THERMAL REACTIONS OF DI(1-PROPENYL) SULFIDE

The thermolysis of dipropenyl sulfide in a flow-type system in an atmosphere of nitrogen at 450-540 deg C leads to propenethiol, thiophene, methylthiophenes, and 2-ethylthiophene.The formation of the thiophene derivatives results from intramolecular radical cyclization of the initial sulfide.Dimethyl selenide (5-10 mole percent) substantially accelerates the thermolysis of dipropenyl sulfide, and the yield of 2-ethylthiophene at 450-480 deg C is increased appreciably.The high-temperature reactions of di(1-propenyl) sulfide with 2-halogenothiophenes and acetylene confirm that the propenethiol and thiophene derivatives are formed in parallel during the thermolysis of dipropenyl sulfide.