Question

Draw the structural formula of the following organic compounds
a) I) 3,4-dimethylpentanal
II) butan-1-ol
III) 4-methylpent-1-ene

Answer 1

I can describe the structural formulas of the given organic compounds for you.

### I) 3,4-dimethylpentanal
- This compound is a pentanal with two methyl groups on the third and fourth carbons.
- The carbon chain has 5 carbons (pent-) with an aldehyde group (-CHO) at the end (pentanal).
- The structural formula can be represented as follows:

```
CH3
|
CH3 - C - CH - CH2 - CHO
|
CH3
```

### II) butan-1-ol
- This compound is a four-carbon alcohol (butanol) with an -OH group at the first carbon.
- The structural formula can be represented as:

```
OH
|
CH3 - CH2 - CH2 - CH3
```

### III) 4-methylpent-1-ene
- This compound is a five-carbon alkene with a double bond between the first and second carbons and a methyl group on the fourth carbon.
- The structural formula can be represented as:

```
CH3
|
CH2 = CH - CH2 - CH - CH3
```

These structures correspond to the names given and illustrate how each compound is organized at the molecular level.