Provide the structures of the major organic products of the following reaction.

Acylium Ion

A positive ion (cation) characterized by the presence of a carbon atom double-bonded to an oxygen atom and bonded to an alkyl or aryl group, but lacking a hydrogen atom.

Butanoyl Chloride

A reactive acyl chloride compound with the chemical formula C4H7ClO, used in organic synthesis to introduce butanoyl functional groups.