Electrophilic reactions are chemical processes where an electrophile, a species that seeks electrons, reacts with a nucleophile, which is rich in electrons. This interaction typically involves the formation of a new bond as the electrophile accepts electron pairs from the nucleophile. Common examples include reactions involving alkenes and aromatic compounds. These reactions are fundamental in organic chemistry and are crucial for synthesizing various compounds. They often occur in the presence of catalysts or under specific conditions to enhance the reaction rate. Understanding electrophilic reactions is essential for fields like pharmaceutical chemistry and materials science.