name the cycloalkenes using systematic names. consider alkene 1. a 5 carbon ring with a double bond between carbons 1 and 2. there is a methyl group on carbon 1 and 3. alkene 1 systematic name: consider alkene 2. a six carbon ring with a double bond between carbons 1 and 2 and between carbons 3 and 4. alkene 2 systematic name: consider alkene 3. a six carbon ring with a double bond between carbons 1 and 2. there is a methyl group on carbon 3 and carbon 6. alkene 3 systematic name: