33240-70-9

Basic information

• Product Name: Perchlorobenzophenone
• Synonyms: Perchlorobenzophenone
• CAS NO: 33240-70-9
• Molecular Weight: 526.672
• Mol File: 33240-70-9.mol
• Article Data: 2

Chemical Properties

• CAS DataBase Reference: Perchlorobenzophenone(CAS DataBase Reference)
• NIST Chemistry Reference: Perchlorobenzophenone(33240-70-9)
• EPA Substance Registry System: Perchlorobenzophenone(33240-70-9)

Safety Data

• Hazardous Substances Data: 33240-70-9(Hazardous Substances Data)

Upstream product

• 90-99-3 diphenylchloromethane 
• 33119-38-9 α-chlorobis(pentachlorophenyl)methane 
• 2051-90-3 Dichlorodiphenylmethane 
• 119-61-9 benzophenone 
• 7647-18-9 antimonypentachloride 
• 3225-61-4 perchlorodiphenylmethyl radical 
• 33240-67-4 Perchlor-diphenyl-methan 
• 141709-02-6 bis(pentachlorophenyl)methyl methanesulfonate 
• 33240-66-3 bis(pentachlorophenyl)methanol 
• 118-74-1 hexachlorobenzene 

Relevant articles and documents

Photochemical Behavior of Stable Free Radicals: The Photochemistry of Perchlorodiphenylmethyl Radical

The excitation of perchlorodiphenylmethyl radical (PDM) at 530 nm leads to the lowest excited doublet, D1 (τ = 31 ns), from which emission is observed (Φ = 1 x 10-3 +/- 0.0003).This state is quenched by electron donors and acceptors at a rate at or close to diffusion control and at much slower rates by oxygen and hydrogen atom donors.Fragmentation of PDM (Φd = 0.06) occurs from a higher excited doublet (Dn, n > = 2) producing intermediates that are trapped by O2, chlorine, or hydrogen donors, yielding products 1-6.Experimental evidence suggests a structure-photoreactivity correlation in the perchlorinated arylmethyl radicals in which the partitioning between photochemical cyclization or fragmentation depends on the twist angle between the appended phenyl rings.