Write the IUPAC names of the following compounds.
(i) `CH_(3)-CH_(2)-underset(OH)underset(|)(CH)-CH_(2)-CH_(2)-underset(CH_(3))underset(|)(CH)-CH_(2)-CH_(3)`
(ii) `CH-=C-CH=CH-CH=CH_(2)`

Explanation

(i)`implies` The functional group present is an alcohol {OH). Hence, the suffix is ‘-ol’, `implies` The longest chain containing -OH has eight carbon atoms. Hence, the corresponding saturated hydrocarbon is octane
`implies` The -OH is on carbon atom 3, In addition, a methyl group is attached at 6th carbon. Hence the IUPAC name is 6-Methyloctan-3-ol
(ii)The two C = C functional groups are present at carbon atoms 1 and 3, while the -C s C functional group is present at carbon 5. These groups are indicated by suffixes Hexa-1, 3-dien -5-yne.