... Chem. SOC. 1977, 99, 4947. 0002-7863/82/1504-7519$01.25/0 0 1982 American Chemical Society Page 2. 1520 J. Am. Chem. ... (5) Fielden, R. J.; Homer, RF; Jones, RL US. Patent 2823987. ... In each case six reversible, chemically stable one-electron reductions are observed. ...