83088-73-7

Upstream product

• 2039-82-9 1-bromo-4-ethenyl-benzene 
• 76-05-1 trifluoroacetic acid 

Downstream Products

• 56913-50-9 1-(4-bromophenyl)-1-phenylethane 
• 1250260-54-8 2-(1-(4-bromophenyl)ethyl)-1,3,5-trimethylbenzene 
• 1250260-53-7 2-(1-(4-bromophenyl)ethyl)-1,4-dimethylbenzene 
• 1250260-55-9 1-bromo-4-(1-(4-fluorophenyl)ethyl)benzene 

Relevant academic research and scientific papers

Addition of Trifluoroacetic Acid to Substituted Styrenes

The rate of addition of CF3CO2H to a series of ring-substituted styrenes ArCH=CH2 with 100percent, 50percent, and 20percent solutions of the acid in CCl4 have been measured.The rate of addition of 100percent CF3CO2H to the isomeric 1-phenylpropenes and the rate of cis- to trans-stilbene isomerization by this acid are also reported.The rates are correlated with ?+ parameters of the substituents and with aqueous H2SO4-catalyzed hydrations of the same substrates.Deviations from the ?+ correlation occur with substituents capable of strong hydrogen bonding to the acidic solvents; these deviations are attributed to a decrease in substituent electron-donating ability caused by this interaction.All of the evidence supports a mechanism of rate-determining protonation on carbon (the AdE2 mechanism), with no detectable effects from ? complexation of the acids with the substrates.