Singlet Diradical Complexes of Chromium, Molybdenum, and Tungsten with Azo Anion Radical Ligands from M(CO)6 Precursors. Inorganic Chemistry, (46)21:8584--8593, 2007. [PUMA: 6 Group arylamidophenylazopyridine crystal diradical diradical;Group diradical;electronic electrochem metal prepn redox singlet structure]