Chapter B, Problem B.6P

Interpretation Introduction

Interpretation:

IUPAC name for the molecule is to be written.

Concept introduction:

For a molecule that has more than one double bond or triple bond, the IUPAC name must indicate the number of double bonds or triple bonds present as well as their locations. To name the molecule with multiple double/triple bonds, establish the root as the longest carbon chain or the largest carbon ring that contains the greatest number of entire $\text{C=C or C}\equiv \text{C}$ groups. Number the chain or ring so that each successive $\text{C=C or C}\equiv \text{C}$ group is encountered the earliest. For each pair of $\text{C=C or C}\equiv \text{C}$ atoms, identify the lower of the two locator numbers. Immediately before the ene or yne suffix, add the letter ‘a’ followed by the above set of locator numbers, and then add the prefix di, tri, etc. to specify the number of double or triple bonds. The substituents attached to the root are named in the alphabetical order.