insertion reactions
Insertion reactions are a type of chemical reaction where a new atom or group is added into a molecule, typically involving unsaturated compounds like alkenes or alkynes. This process often occurs in the presence of catalysts, which help facilitate the reaction without being consumed.
In these reactions, the incoming atom or group is inserted into a bond, usually breaking a π bond (double or triple bond) and forming new σ bonds. Common examples include the hydrogenation of alkenes, where hydrogen is added, and polymerization, where small monomers combine to form larger polymer chains.