Click chemistry, a method for the modular synthetic synthesis of novel chemical entities, is the subject of this lesson. The development of carbon-heteroatom bonds using spring-stacked reactants is vital to this exceptionally powerful strategy. Almost every sector of contemporary chemistry makes use of it, from medicinal research to materials development. Because of its constancy, explicitness, and biocompatibility, the copper(I)- catalyzed 1,2,3-triazole forming reaction among azides and terminal alkynes has transformed into the highest quality level of snap science.