They can be part of the same or different homologous series, e.g. alkenes and cycloalkanes can be isomers. Due to their different structures their physical properties (melting point, boiling point ...

However, catalytic methods that selectively produce the Z-isomers of these alkenes are rare. This is because the Z-isomers ...

Secondly, the reaction is usually highly and predictably stereoselective for the formation of one of the two geometric alkene isomers 1. The utility of the reaction was recognized by the award of ...