Question

for each organic compound in the table below, name the highlighted side chain.
note for advanced students: dont include the locant of the side chain.

compound	name of highlighted side chain

| \\(\

$$\begin{matrix} & & & \\text{ch}_3 & & \\\\ & & & \\mid & & \\\\ & & & \\text{ch}_2 & & \\\\ \\text{ch}_3 & — & \\text{ch}_2 & — & \\text{ch} & — & \\text{ch}_2 & — & \\text{ch}_3 \\end{matrix}$$

\\) | ethyl |
| \\(\

$$\begin{matrix} \\text{ch}_3 & — & \\text{ch}_2 & — & \\text{ch}_2 & — & \\text{ch}_2 & — & \\text{ch}_2 & — & \\text{ch}_2 & — & \\text{ch} & & \\\\ & & & & & & & & & & & & \\mid & \\text{h} — \\text{c} \\boldsymbol{=} \\text{o} \\\\ & & & & & & & & & & & & \\mid & \\text{h} — \\text{c} \\boldsymbol{=} \\text{o} \\end{matrix}$$

\\) | hexyl |
| \\(\

$$\begin{matrix} & & & \\text{ch}_3 & & \\\\ & & & \\mid & & \\\\ & & \\text{ch}_2 & — & \\text{ch}_2 & & \\\\ & & \\mid & & & & \\\\ \\text{ch}_3 & — & \\text{ch} & — & \\text{ch}_2 & — & \\text{ch}_3 \\end{matrix}$$

\\) | \\(\square\\) |

Explanation:

1. Identify the highlighted side chain: It is the branched group $\text{CH}_3\text{CH}_2\text{CH}_2-$ attached to the main carbon chain.
2. Count the number of carbon atoms in the side chain: There are 3 carbon atoms.
3. Name the alkyl group with 3 carbons, following IUPAC conventions for side chains, and omit the locant as instructed.

Answer:

propyl