Hydroboration is a chemical reaction that involves the addition of borane (BH3) to alkenes or alkynes. This process typically occurs in a two-step mechanism, where boron adds to the less substituted carbon atom of the double or triple bond, resulting in a trialkylborane intermediate. In the second step, the trialkylborane undergoes oxidation, usually with hydrogen peroxide (H2O2) in the presence of a base, converting the boron compound into an alcohol. This reaction is valuable in organic synthesis because it allows for the formation of alcohols with high regioselectivity and can be used to create complex molecules.