Write the IUPAC names of the compounds i-iv from their given structures.
`underset(6)CHequivunderset(5)C-underset(4)CH=underset(3)CH-underset(2)CHequivunderset(1)CH_(2)`

Explanation

The two C=C functional groups are present at carbon atoms 1 and 3, while the C≡C functional group is present at carbon 5. These groups are indicated by suffixes ‘diene’ and ‘yne’ respectively. The longest chain containing the functional groups has 6 carbon atoms, hence the parent hydrocarbon is hexane. The name of compound, therefore, is Hexa-1,3- dien-5-yne.