Traditionally, double bond stereochemistry was described as either cis (Latin, on this side) or trans (Latin, across), in reference to the relative position of substituents on either side of a double bond. A simple example of cis–trans isomerism is the 1,2-disubstituted ethenes, like the dichloroethene (C2H2Cl2) isomers shown below.
Traditionally, double bond stereochemistry was described as either cis (Latin, on this side) or trans (Latin, across) in reference to the relative position of substituents on either side ,of a double bond. A simple example of cis–trans isomerism is the 1,2-disubstituted ethenes like the dichloroethene (C2H2Cl2) isomers shown be,low.