Write the structural formula of 1- phenylpentan - 1 one.

Explanation

To write the structural formula of 1-phenylpentan-1-one, we will follow these steps:

### Step 1: Identify the main chain and functional group
1. The name "pentan-1-one" indicates that the main chain has 5 carbon atoms (pentane) and a ketone functional group (indicated by "one") at carbon 1.

### Step 2: Draw the main carbon chain
2. Start by drawing a straight chain of 5 carbon atoms:
- C1 - C2 - C3 - C4 - C5
...