79183-98-5

Basic information

• Product Name: 1,2-dibromo-1,2-di-(p-chlorophenyl)-ethane
• Synonyms: 1,2-dibromo-1,2-di-(p-chlorophenyl)-ethane
• CAS NO: 79183-98-5
• Molecular Weight: 408.947
• Mol File: 79183-98-5.mol
• Article Data: 2

Chemical Properties

• CAS DataBase Reference: 1,2-dibromo-1,2-di-(p-chlorophenyl)-ethane(CAS DataBase Reference)
• NIST Chemistry Reference: 1,2-dibromo-1,2-di-(p-chlorophenyl)-ethane(79183-98-5)
• EPA Substance Registry System: 1,2-dibromo-1,2-di-(p-chlorophenyl)-ethane(79183-98-5)

Safety Data

• Hazardous Substances Data: 79183-98-5(Hazardous Substances Data)

Upstream product

• 2510-74-9 (E)-1,2-di(4-chlorophenyl)ethene 
• 2510-74-9 cis-4,4'-dichlorostilbene 
• 5121-74-4 4,4'-dichlorostylbene 

Downstream Products

• 1820-42-4 bis(4-chlorophenyl)acetylene 
• 2510-74-9 (E)-1,2-di(4-chlorophenyl)ethene 
• 3457-46-3 4,4'-dichlorobenzil 

Relevant articles and documents

Equilibria and UV-spectral characteristics of BrCl, BrCl2-, and Br2Cl- species in 1,2-dichloroethane - Stereoselectivity and kinetics of the electrophilic addition of these species to alkenes

UV/Vis spectrophotometric measurements have been used to determine the equilibrium constants and the absorption spectra of Bu4N+Br2Cl- and Bu4N+BrCl2- species in 1,2-dichloroethane (DCE) at 25°C. The formation constants and the absorption spectra of BrCl from Br2 and Cl2 and of Bu4N+Cl3- species from Bu4N+Cl- and Cl2 were also determined in this solvent at 25°C. The kinetics and the products of bromochlorination of several aryl-substituted olefins with BrCl, with Br2 in the presence of an excess of Bu4N+Cl- (Br2/Cl-), and with BrCl in the presence of an excess of Bu4N+Cl- (BrCl/Cl-) were investigated in DCE at different temperatures. The kinetics and product distribution data for the reactions with Br2/Cl- or BrCl/Cl- are interpreted on the basis of a mechanism involving a product- and rate-determining nucleophilic attack by chloride on the olefin-halogen (Br2 or BrCl) π complex. The data relating to the electrophilic addition of BrCl are interpreted in terms of the initial formation of a 1:1 olefin-BrCl π complex, the ionization of which, catalyzed by a second halogen molecule, gives a bromonium (or β-bromocarbenium) BrCl2- ion pair able to collapse to the corresponding bromochloro adducts. A significant proportion of the ion pair intermediates may, however, actually be present as bromonium (or β-bromocarbenium) Br2Cl- and Br3- ion pairs, and the collapse of these should be responsible for the formation of the dibromides in BrCl addition.