Cis-trans Isomers in
Cycloalkanes
Two groups may be on the same
side (cis) of the imagined plane of the cycloring or
they may be on the opposite side (trans). The two isomers are referred to
geometric or cis-trans isomers.
E. g.
cis-1-chloro-3-ethylcyclohexane
trans-1-chloro-3-ethylcyclohexane
cis-1,4-dichlorolcyclohexane
trans-1,4-dichlorocyclohexane