Give names of the reagents to bring about the following transformations:
(i) Hexan-1-ol to hexanal
(ii) Cyclohexanol to cyclohexanone
(iii) p-Fluorotoluene to
(iv) Ethanenitrile to ethanal p-fluorobenzaldehyde
(v) Allyl alcohol to propenal
(vi) But-2-ene to ethanal

Explanation

To solve the transformations mentioned in the question, we will identify the appropriate reagents for each conversion step by step.

### Step-by-Step Solutions:

**(i) Hexan-1-ol to hexanal**
1. **Identify the transformation**: We need to convert a primary alcohol (hexan-1-ol) to an aldehyde (hexanal).
2. **Choose the reagent**: A mild oxidizing agent is required to stop the oxidation at the aldehyde stage.
3. **Reagent**: Pyridinium chlorochromate (PCC) is suitable for this transformation.
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