A Novel Diiminopyridine Ligand Containing Redox Active Co(III) Mixed Sandwich Complexes

The synthesis of a diiminopyridine
(DIMPY) ligand containing pendant mixed sandwich cobaltocene functionalities
on the imine nitrogens was prepared and characterized (18). Its reactivity with 2 equiv of GeCl2·dioxane and
SnCl2 in THF yields the respective Lewis base mediated
autoionization products (18Ge and 18Sn).
Analogous low-valent complexes utilizing an N,N′- differocenyl diiminopyridine support were also
prepared (15Ge and 15Sn). All compounds
were characterized by spectroscopic and X-ray crystallographic methods.
Electrochemical studies were conducted for both 15Sn and
the precursor of 18.