Coordination Chemistry of Verdazyl RadicalsComments on Inorganic Chemistry (2015)
The past 17 years have seen the growth of the coordination chemistry of verdazyls—stable free radicals first reported in 1963. Though verdazyls are weakly basic ligands, the ability to synthesize derivatives with chelating substituents, along with the steric similarity of verdazyls to aromatic azine ligands, has resulted in a variety of coordination compounds. Coordination compounds have been reported with Mn2+, Co2+, Ni2+, Cu+, Cu2+, Zn2+, Ru2+, Ag+, Cd2+, Tb3+, Dy3+, Gd3+ and Hg2+. These studies have resulted in observations of strong ferromagnetic exchange (up to 400 cm−1), ligand-based redox processes, and non-innocent behavior. On the whole, verdazyls are weakly basic ligands in which the half-filled pi orbital can act as either an electron acceptor or an electron donor. The richness of the metal-verdazyl interaction, along with the structural diversity of verdazyls, provides many further opportunities for novel chemistry, as well as fertile ground for the introduction of undergraduates to research.
- free radical,
- coordination chemistry
Publication DateJanuary, 2015
Citation InformationDavid J R Brook. "Coordination Chemistry of Verdazyl Radicals" Comments on Inorganic Chemistry Vol. 35 Iss. 1 (2015) p. 1 - 17 ISSN: 0260-3594
Available at: http://works.bepress.com/david_brook/28/