Bicyclo[2.2.1]hept-5-en-2-ylmethanamine, commonly known as 5-norbornene-2-methylamine or NBMA, is a bicyclic amine derivative featuring a norbornene core. It is a colorless to pale yellow liquid with a characteristic amine odor. The molecule contains a strained bicyclic alkene (norbornene) moiety and a primary amine functional group, making it a versatile and reactive monomer. Its primary and most significant application is in polymer chemistry, particularly in the synthesis of functionalized polymers via ring-opening metathesis polymerization (ROMP). The amine group allows for easy post-polymerization modifications, enabling the creation of polymers with tailored properties for advanced materials. These polymers find use in areas such as coatings, adhesives, and as precursors for specialty materials requiring amine functionality for further chemical attachment or cross-linking. As a specialized building block, it is also utilized in organic synthesis to introduce the rigid norbornene scaffold into target molecules. It serves as a key intermediate in the preparation of ligands, catalysts, and other functional organic compounds where its unique geometry and reactivity are advantageous.