33922-75-7

Basic information

• Product Name: 3,4-dimethylthiophen-2(5H)-one
• Synonyms: 2(5H)-thiophenone, 3,4-dimethyl-; 2,5-Dihydro-3,4-dimethylthiophen-2-one
• CAS NO: 33922-75-7
• Molecular Formula: C₆H₈OS
• Molecular Weight: 128.1921
• Mol File: 33922-75-7.mol
• Article Data: 2

Chemical Properties

• Boiling Point: 220°C at 760 mmHg
• Flash Point: 91°C
• Density: 1.124g/cm³
• Vapor Pressure: 0.116mmHg at 25°C
• Refractive Index: 1.539
• CAS DataBase Reference: 3,4-dimethylthiophen-2(5H)-one(CAS DataBase Reference)
• NIST Chemistry Reference: 3,4-dimethylthiophen-2(5H)-one(33922-75-7)
• EPA Substance Registry System: 3,4-dimethylthiophen-2(5H)-one(33922-75-7)

Safety Data

• Hazardous Substances Data: 33922-75-7(Hazardous Substances Data)

Upstream product

• 632-15-5 3,4-dimethylthiophene 
• 35983-75-6 4-methyl-2(5H)-thiophenone 
• 74-88-4 methyl iodide 
• 616-44-4 3-Methylthiophene 

Relevant articles and documents

Synthesis of hetero atom modified pyrromethenones

A series of six heteroaromatic compounds, ethyl-/methyl-and dimethylfuranones, thiophenones, and cyclopentenones, was synthesized and condensed with a methyl methylpropionate substituted pyrrole, yielding the "right" half of open-chain tetrapyrroles. These compounds serve as light-inducible chromophores in the plant photoreceptor phytochrome. Three-dimensional structure analysis of the 10-oxapyrromethen-1-one 25 revealed a planar conformation, similar to the dipyrromethenone parent compound, stabilized by a hydrogen bond formed between the pyrrole proton and the furanone oxygen atom. All six pyrrole-substituted heteroaromatic derivatives 25-30 show absorbances in the visible spectrum with high molar extinction coefficients. Wiley-VCH Verlag GmbH & Co. KGaA, 2007.