42855-50-5

Basic information

• Product Name: 3-methyl-2,5-dihydrothiophene
• Synonyms: Thiophene, 2,5-dihydro-3-methyl-
• CAS NO: 42855-50-5
• Molecular Formula: C₅H₈S
• Molecular Weight: 100.182
• Mol File: 42855-50-5.mol
• Article Data: 1

Chemical Properties

• Boiling Point: 137.3°C at 760 mmHg
• Flash Point: 32.3°C
• Density: 1.007g/cm³
• Vapor Pressure: 8.78mmHg at 25°C
• Refractive Index: 1.533
• CAS DataBase Reference: 3-methyl-2,5-dihydrothiophene(CAS DataBase Reference)
• NIST Chemistry Reference: 3-methyl-2,5-dihydrothiophene(42855-50-5)
• EPA Substance Registry System: 3-methyl-2,5-dihydrothiophene(42855-50-5)

Safety Data

• Hazardous Substances Data: 42855-50-5(Hazardous Substances Data)

Upstream product

• 616-44-4 3-Methylthiophene 
• 83044-85-3 3-allylsulfanyl-2-methyl-propene 
• 67-56-1 methanol 
• 7664-41-7 ammonia 

Downstream Products

• 1193-10-8 3-methyl-2,5-dihydrothiophen-1,1-dioxide 

Relevant articles and documents

Metathetical cyclization of dienes: tolerance and behavior of a cyclometallated aryloxycarbene complex of tungsten towards diallylic compounds

Intramolecular metathesis of various diallylic compounds containing the O, S, Si or P hetero-elements was achieved in good yields by using the cyclometallated carbene complex W(OAr)(OAr)(CHCMe3)Cl(OEt2).Unsubstituted diallyl ether is converted into 2,5-dihydrofuran; diallyl sulfide is converted into 2,5-dihydrothiophen; diallylphenyl phosphine is converted into 1-phenyl-2,5-dihydro-1H-phosphole; and diallyldimethyl- or diphenylsilanes are converted into the corresponding silacyclopentenes.The metathesis reaction of methyl-substituted diallyl sulfides shows that steric effects are very important.Depending on the position of the methyl groups, the reaction can proceed normally or be completely inhibited. - Keywords: metathesis / tungsten / cyclization / steric hindrance / heteroatom