Abstract: α,β-Dibromophenylpropionyl chloride reacting with organic amine (lower molecular weight) can yield a pair 01 cis and trans geometric isomers of α-bromocinnamamide. But the relative amounts of cis and trans isomers are influenced by the ratio of the amine employed. On the other hand the substituents on the phenyl ring and the solvents used in the reaction have some influence too. By this method and preparative TLC, we isolated and obtained eight pairs of geometric isomers including m-chloro-α-bromo-N-sec-butyl-cinramamides, p-bromo-α-bromo-N-isopropyl-cin-namamides, etc.