41140-00-5

Basic information

• Product Name: 3,6-dimethyl-9H-fluoren-9-one
• CAS NO: 41140-00-5
• Molecular Formula: C₁₅H₁₂O
• Molecular Weight: 208.2552
• Mol File: 41140-00-5.mol
• Article Data: 2

Chemical Properties

• Boiling Point: 383.9°C at 760 mmHg
• Flash Point: 170.3°C
• Density: 1.174g/cm³
• Vapor Pressure: 4.25E-06mmHg at 25°C
• Refractive Index: 1.635
• CAS DataBase Reference: 3,6-dimethyl-9H-fluoren-9-one(CAS DataBase Reference)
• NIST Chemistry Reference: 3,6-dimethyl-9H-fluoren-9-one(41140-00-5)
• EPA Substance Registry System: 3,6-dimethyl-9H-fluoren-9-one(41140-00-5)

Safety Data

• Hazardous Substances Data: 41140-00-5(Hazardous Substances Data)

Upstream product

• 5524-56-1 ethyl 2-p-tolyl-2-oxoacetate 
• 3457-48-5 1,2-di(4-methylphenyl)-1,2-ethanedione 
• 108-88-3 toluene 
• 79-37-8 oxalyl dichloride 

Downstream Products

• 173439-29-7 4',5'-dihydro-3,6-dimethyl-1',3'-diphenyl-spiro<9H-fluorene-9,5'-<1H-1,2,4>triazole> 

Relevant articles and documents

Dications of fluorenylidenes. The effect of substituent electronegativity and position on the antiaromaticity of substituted tetrabenzo[5.5]fulvalene dications

Oxidation of 3,6-disubstituted tetrabenzo[5.5]fulvalenes by SbF5 results in the formation of dications that behave like two antiaromatic fluorenyl cations connected by a single bond. Both fluorenyl systems exhibit the paratropic shifts and nucleus independent chemical shifts (NICS) characteristic of antiaromatic species. Comparison with analogous 2,7-disubstituted tetrabenzo[5.5]fulvalenes reveals that the antiaromaticity of the substituted ring system can be altered substantially by changes in the placement of the substituents, possibly due to changes in the delocalization of charge in the system. Substituents in the 3,6-position decrease the antiaromaticity because of the increase in the benzylic resonance compared to 2,7-substituents.