The IUPAC names of the compounds are: (a) 3-Methylcyclohexene (b) 1,5-Dimethylcyclopentene (c) 1-Ethylcyclobuta-1,3-diene (d) 1,2-Dimethylcyclohexa-1,4-diene (e) 5-Methylcyclohexa-1,3-diene (f) Cycloocta-1,5-diene
Work Step by Step
1. We number the cycloalkenes in such a manner that the double bond is between the first and the second carbon of the cycloalkene. 2. In case substituents are present, they are assigned the lowest number/locant. 3. The suffix -diene is used whenever there are two double bonds in the cycloalkene ring. Also their positions need to be indicated.