54191-78-5

Basic information

• Product Name: cyclopenta-2,4-dien-1-ylidenemethanethione
• Synonyms: Methanethione, 2,4-cyclopentadien-1-ylidene-
• CAS NO: 54191-78-5
• Molecular Formula: C₆H₄S
• Molecular Weight: 108.161
• Mol File: 54191-78-5.mol
• Article Data: 3

Chemical Properties

• Boiling Point: 218.6°C at 760 mmHg
• Flash Point: 86°C
• Density: 1.07g/cm³
• Vapor Pressure: 0.184mmHg at 25°C
• Refractive Index: 1.609
• CAS DataBase Reference: cyclopenta-2,4-dien-1-ylidenemethanethione(CAS DataBase Reference)
• NIST Chemistry Reference: cyclopenta-2,4-dien-1-ylidenemethanethione(54191-78-5)
• EPA Substance Registry System: cyclopenta-2,4-dien-1-ylidenemethanethione(54191-78-5)

Safety Data

• Hazardous Substances Data: 54191-78-5(Hazardous Substances Data)

Upstream product

• 65330-66-7 benzothiirene 
• 81214-76-8 2-Cyclopentadienyliden-1,3-dithietan 
• 75126-75-9 (6-thioxo-2,4-cyclohexadien-1-ylidene)methanone 

Relevant articles and documents

PHOTOLYSIS AND GAS PHASE PYROLYSIS OF 1,2,3-BENZOSELENADIAZOLE - MATRIX ISOLATION OF BENZOSELENIRENE

Based on comparative studies on 1,2,3-benzothiazole benzoselenirene is identified as an intermediate in the low temperature photolysis and gas phase pyrolysis of 1,2,3-benzoselenadiazole by IR spectroscopy.

Gas Phase Reactions, 24. The Thermal Generation of Thiocarbonyl Compounds

Thiocarbonyl derivatives R1R2C=S with R1, R2 = H, CH3, C6H5 can be generated thermally in the gas phase from a variety of precursors.Especially advantageous are the cleavage of propene from allyl sulfides or, for their preparation in pure form, the pyrolysis of dithietane or trithiolane derivatives.Photoelectron spectroscopy proves to be well-suited for gas analysis in the flow tube used, for the optimization of the decomposition conditions, and via assignment of the observed ionization patterns for the characterization of the thioaldehydes and thioketones prepared.