title: Fe (III) complexes of a bis-benzimidazolyl diamide ligand: spectral and catalytic studies.
abstract: A new tetradentate bis benzimidaozlyl diamide ligand N,N'-Bis (benzimidazol-2-yl-methyl)-hexane-1,6-dicarboxamide (GBSA) has been synthesized and utilized to prepare new Fe(III) complexes with exogenous anionic ligand X=Cl(-) and NO(3)(-). Isomer shift values are in the range found for Iron in the +3 oxidation state while Quadrupole Splitting indicates large distortion from a six coordinate geometry, a finding supported by low temperature EPR work. The E(1/2) values are found to be quite cathodic indicating stability of the Iron (III) complexes. The oxidation of alcohols was investigated using [Fe(GBSA)Cl(3)] as the catalyst with TBHP as an alternate source of oxygen. The respective carbonyl products have been isolated and characterized by (1)H NMR, electronic spectroscopy, mass and IR spectral studies.
authors: Department of Chemistry, University of Delhi, Delhi, India. gauriahuja84@gmail.com
authors: Gauri
authors: G
authors: Ahuja
authors: Pavan
authors: P
authors: Mathur
mesh_terms: D001562:Benzimidazoles / Q000737:chemistry*; D002384:Catalysis; D003958:Diamide / Q000737:chemistry*; D005290:Ferric Compounds / Q000737:chemistry*; D008024:Ligands; D009682:Magnetic Resonance Spectroscopy; D010084:Oxidation-Reduction; D013055:Spectrophotometry, Infrared
chemical_list: D001562:Benzimidazoles; D005290:Ferric Compounds; D008024:Ligands; D003958:Diamide; C031000:benzimidazole