Answer:
See figure attached.
Step-by-step explanation:
Pyridinium chlorochromate (PCC) is a weaker oxidizing agent when compared with oth chromic acid derivatives as dichromate, for example. This results in the fact that PCC wil oxidize a primary alcohol transforming it to a aldehyde.
The entire mechanism of the reaction of 1-butanol with PCC in an anhydrous solvent is shown in the figure attached.
The neutral intermediate and the organic product (1-butanal) are both represented in the figure.