1. Reversible, Redox-Controlled Ligand Binding to Fe and
Co Bis(dithiolene) Complexes; Improved Synthetic
Access to Dithiolene Ligands and Complexes
Kuppuswamy Arumugam, Rongmin Yu, Perumalreddy Chandrasekaran, Upul Jayarathne, Joel T. Mague and
James P. Donahue; Department of Chemistry, Tulane University, New Orleans, LA 70118
Binding of ligands such as phosphines to Fe and Co bis(dithiolene) complexes is reversible and governed by the
redox state of the metallodithiolene complex. Selectivity for other ligand types, such as nitrogen heterocycles,
might be accomplished with dithiolene ligand substituents that are more hindered and electron withdrawing.
Access to a broad variety of dithiolene ligands and metallodithiolene complexes, many of the them new, has
been developed with 1,3-dithiol-2-ones (1) and 2,2-di-n-butyl-4,5-dialkyl-1,3,2-dithiastannoles, (2):