Cis-Trans Isomerism in Cycloalkanes Cycloalkanes:Two faces (as viewed edge on) Top face Bottom face Isomerism possible in substituted cycloalkanes cis-1,2-Dimethylcyclopropane trans-1,2-Dimethylcyclopropane▪ Cycloalkanes: Two faces (as viewed edge on) Top face Bottom face ▪ Isomerism possible in substituted cycloalkanes Cis-Trans Isomerism in Cycloalkanes