title: Studies of iron(III) porphyrinates containing silanethiolate ligands.
abstract: The chemistry of several iron(III) porphyrinates containing silanethiolate ligands is described. The complexes are prepared by protonolysis reactions of silanethiols with the iron(III) precursors, [Fe(OMe)(TPP)] and [Fe(OH)(H2O)(TMP)] (TPP = dianion of meso-tetraphenylporphine; TMP = dianion of meso-tetramesitylporphine). Each of the compounds has been fully characterized in solution and the solid state. The stability of the silanethiolate complexes versus other iron(III) porphyrinate complexes containing sulfur-based ligands allows for an examination of their reactivity with several biologically relevant small molecules including H2S, NO, and 1-methylimidazole. Electrochemically, the silanethiolate complexes display a quasi-reversible one-electron oxidation event at potentials higher than that observed for an analogous arenethiolate complex. The behavior of these complexes versus other sulfur-ligated iron(III) porphyrinates is discussed.
authors.affiliation: Department of Chemistry, University of Texas at San Antonio (UTSA) , San Antonio, Texas 78249, United States.
authors.forename: Daniel J
authors.initials: DJ
authors.lastname: Meininger
authors.forename: Jonathan D
authors.initials: JD
authors.lastname: Caranto
authors.forename: Hadi D
authors.initials: HD
authors.lastname: Arman
authors.forename: Zachary J
authors.initials: ZJ
authors.lastname: Tonzetich
mesh_terms: D004563:Electrochemistry; D007093:Imidazoles / Q000737:chemistry; D007501:Iron / Q000737:chemistry*; D008024:Ligands; D009682:Magnetic Resonance Spectroscopy; D008665:Metalloporphyrins / Q000138:chemical synthesis / Q000737:chemistry*; D015394:Molecular Structure; D010084:Oxidation-Reduction; D011166:Porphyrins / Q000737:chemistry*; D012821:Silanes / Q000737:chemistry; D013455:Sulfur / Q000737:chemistry
chemical_list: D007093:Imidazoles; D008024:Ligands; D008665:Metalloporphyrins; D011166:Porphyrins; D012821:Silanes; D013455:Sulfur; C049692:tetraphenylporphine; D007501:Iron; C018100:1-methylimidazole