Reversible, Redox-Controlled Ligand Binding to Fe and

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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):