1643-48-7

Basic information

• Product Name: 9-(2-bromobenzylidene)-9H-fluorene
• CAS NO: 1643-48-7
• Molecular Formula: C₂₀H₁₃Br
• Molecular Weight: 333.2212
• Mol File: 1643-48-7.mol
• Article Data: 4

Chemical Properties

• Boiling Point: 436.9°C at 760 mmHg
• Flash Point: 213.3°C
• Density: 1.434g/cm³
• Vapor Pressure: 1.99E-07mmHg at 25°C
• Refractive Index: 1.723
• CAS DataBase Reference: 9-(2-bromobenzylidene)-9H-fluorene(CAS DataBase Reference)
• NIST Chemistry Reference: 9-(2-bromobenzylidene)-9H-fluorene(1643-48-7)
• EPA Substance Registry System: 9-(2-bromobenzylidene)-9H-fluorene(1643-48-7)

Safety Data

• Hazardous Substances Data: 1643-48-7(Hazardous Substances Data)

Upstream product

• 2113-51-1 2-iodobiphenyl 
• 86-73-7 9H-fluorene 
• 6630-33-7 ortho-bromobenzaldehyde 
• 7253-07-8 (9H-fluoren-9-yl)triphenylphosphonium bromide 
• 4756-25-6 (9H-fluoren-9-ylidene)triphenylphosphorane 

Downstream Products

• 205-99-2 benzo[e]acephenanthrylene 

Relevant articles and documents

Palladium-catalyzed coupling reaction of 2-iodobiphenyls with alkenyl bromides for the construction of 9-(diorganomethylidene)fluorenes

An atom economical protocol for the construction of 9-(diorganomethylidene)fluorenes through palladium-catalyzed coupling reactions of 2-iodobiphenyls with alkenyl bromides has been reported. The reaction proceeds through the C-H activation/oxidative addition/reduction elimination/intramolecular Heck coupling reaction to afford a series of 9-(diorganomethylidene)fluorenes with good yields. Control experiments demonstrate that a five-membered palladacycle acts as a key intermediate and β-H elimination serves as the rate-limiting step.

Effects of incorporating regioisomers and flexible rotors to direct aggregation induced emission to achieve stimuli-responsive luminogens, security inks and chemical warfare agent sensors

Efficient transformation of ACQ materials to AIE luminogens using simple design principles of positional isomerization and C-C bond exclusion is presented here. Consequently, the bond link, position and packing influence the photophysical properties that can be utilized in erasable secret inks, pressure sensors and chemical warfare sensors.