What are the structural isomers of C6H12? What are the isomers of C6H12? 1-Methylcyclopentane. 1-Ethylcyclobutane. 1,1-Dimethylbutane. 1,2-Dimethylcyclobutane. 1,3-Dimethylcyclobutane. 1-Propylcyclopropane. 1-(1-methylethyl)cyclopropane. 1-Ethyl-1-methylcyclopropane. How many structural isomers…