Chapter 21, Problem 21.7P

Interpretation Introduction

(a)

Interpretation: The IUPAC name (including any $E,Z$ designation) for the given unsaturated aldehyde is to be stated.

Concept introduction: One should follow the given steps to give the IUPAC name of an aldehyde. The first step is finding of longest parent chain that contains an aldehyde group. The second step is changing of -e ending of the parent alkane to the suffix -al. However, when an aldehyde $\left(\text{CHO}\right)$ group is bonded to a ring then after naming of ring, the suffix -carbaldehyde is used. The third step is numbering of chain or ring by putting the $\text{CHO}$ group at $\text{C1}$, and using the general rules of nomenclature.

Interpretation Introduction

(b)

Interpretation: The IUPAC name (including any $E,Z$ designation) for the given unsaturated aldehyde is to be stated.

Concept introduction: One should follow the given steps to give the IUPAC name of an aldehyde. The first step is finding of longest parent chain that contains an aldehyde group. The second step is changing of -e ending of the parent alkane to the suffix -al. However, when an aldehyde $\left(\text{CHO}\right)$ group is bonded to a ring then after naming of ring, the suffix -carbaldehyde is used. The third step is numbering of chain or ring by putting the $\text{CHO}$ group at $\text{C1}$, and using the general rules of nomenclature.