Answer
The IUPAC names of the compounds are:
(a) 3-Methylhexa-2,4-diene
(b) Hepta-1,3,5-triene
(c) Hepta-2,3,5-triene
(d) 3-Propylpenta-1,3-diene
Work Step by Step
The following rules are followed while naming the compounds:
1. Count the longest chain of carbon atoms containing the multiple bonds.
2. Assign locants to the substituents.
3. The parent chain is numbered beginning at the end of the chain closest to one of the double bonds.
4. The suffix -diene is used in case of two double bonds/the suffix -triene is used in case of three double bonds in the parent chain.
