Draw the structure of hexane-1, 6-dioic acid.

Explanation

To draw the structure of hexane-1,6-dioic acid, follow these steps:

### Step-by-Step Solution:

1. **Identify the Base Chain**:
- The name "hexane" indicates that the main carbon chain consists of 6 carbon atoms.

2. **Draw the Carbon Backbone**:
- Start by drawing a straight chain of 6 carbon atoms. This can be represented as:
```
C - C - C - C - C - C
```

3. **Identify the Functional Groups**:
- The term "dioic acid" indicates that there are two carboxylic acid (–COOH) groups. The "1,6" indicates that these groups are located at the first and sixth carbon atoms of the chain.

4. **Add the Carboxylic Acid Groups**:
- At the first carbon (C1), add a –COOH group.
- At the sixth carbon (C6), also add a –COOH group.
- The structure now looks like this:
```
COOH - C - C - C - C - C - COOH
```

5. **Complete the Carbon Chain**:
- Each carbon atom in the chain needs to have four bonds.
- The first carbon (C1) is bonded to one oxygen from the –COOH group and needs three more hydrogens.
- The middle carbons (C2, C3, C4, C5) will each be bonded to two hydrogens and the adjacent carbons.
- The sixth carbon (C6) is bonded to one oxygen from the –COOH group and needs three more hydrogens.
- The complete structure will be:
```
HOOC - CH2 - CH2 - CH2 - CH2 - COOH
```

6. **Final Structure**:
- The final structure of hexane-1,6-dioic acid can be represented as:
```
HOOC-CH2-CH2-CH2-CH2-COOH
```