Tags: Chemical Compound, Chemical Substance.
5-Dehydro-m-xylylene (DMX) is an aromatic organic triradical and the first known organic molecule to violate Hund’s Rule.Its electronic ground state is an open-shell doublet rather than a quartet; that is it contains three low-spin coupled unpaired electrons in three singly occupied molecular orbitals. Because there are radical electrons in both spin states this compound is said to exhibit antiferromagnetism.
