4,4′-diaminodimethane: a magical chemical molecule 4,4′-diaminodimethane (MDA, Methylene Dianiline) is an important organic compound with a chemical formula of C13H12N2. MDA has two symmetrical amino functional groups, located at the 4th position of the two rings, connected by a methylene group (-CH2-) in the middle. This unique structure imparts excellent chemical properties and wide range...