# What happens when acetic acid is added after hydroboration of an alkene?

The hydroboration (of alkenes) reactions I've seen so far, were always followed by oxidation (to yield alcohols).

In those reactions we add $\ce{H2O2}$ & $\ce{NaOH}$ after hydroboration for oxidation.

Today I found a peculiar reaction in which acetic acid was added after hydroboration.

I don't quite understand what exactly happens after the hydroboration part. Can someone enlighten me here?