title: Sulfonamido tripods: tuning redox potentials via ligand modifications.
abstract: A series of FeII-OH2complexes were synthesized with ligands based on the tetradentate sulfonamido tripodN,N',N"-[2,2',2"-nitrilotris(ethane-2,1-diyl)]-tris-({R-Ph}-sulfonamido). These complexes differ by the substituent on the aryl rings and were fully characterized, including their molecular structures via X-ray diffraction methods. All the complexes were five-coordinate with trigonal bipyramidal geometry. A linear correlation was observed between the electronic effects of each ligand, given by the Hammett constants of thepara-substituents, and the potential of the FeII/FeIIIredox couple, which were determined using cyclic voltammetry. It was found that the range of redox potentials for the complexes spanned approximately 160 mV.
authors.affiliation: Department of Chemistry, University of California - Irvine, 1102 Natural Sciences II, Irvine, California 92697-2025, United States.
authors.forename: Nathanael
authors.initials: N
authors.lastname: Lau
authors.affiliation: Department of Chemistry, University of California - Irvine, 1102 Natural Sciences II, Irvine, California 92697-2025, United States.
authors.forename: Joseph W
authors.initials: JW
authors.lastname: Ziller
authors.affiliation: Department of Chemistry, University of California - Irvine, 1102 Natural Sciences II, Irvine, California 92697-2025, United States.
authors.forename: A S
authors.initials: AS
authors.lastname: Borovik