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...