Chapter B, Problem B.28P

Interpretation Introduction

Interpretation:

The structure for $\text{1, 4-cyclohexadiene}$ is to be drawn. Another name, in which the ‘1, 4’ can appear in another place in the name is to be written.

Concept introduction:

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