title: Spectral studies of Fe(III) complexes of dipodal tridentate chelating agents.
abstract: The dipodal ligands (Im) and (BIm) as well as complexes [FeLCl(3)] [L=Im (1) and BIm (2)] have been prepared and studied using spectroscopic techniques. The magnetic moment, IR, electronic (ligand field), FAB-mass and NMR spectral data indicate a hexa-coordinate geometry around high-spin state Fe(3+) where the ligands coordinate as a tridentate [N,N,N] chelating agent. (57)Fe-Mössbauer spectral data confirmed the presence of a ligand asymmetry around Fe(3+) in a high-spin state electronic configuration (t(2g)(3),e(g)(2), S=5/2) with nuclear transition Fe(+/-3/2-->+/-1/2) exhibiting Kramer's double degeneracy. The molecular computations provided the optimum energy perspective plots for the molecular geometries giving the important structural data.
authors.affiliation: Department of Chemistry, Aligarh Muslim University, Aligarh 202002, India. zafarasiddiqi@yahoo.co.in
authors.forename: Zafar Ahmad
authors.initials: ZA
authors.lastname: Siddiqi
authors.forename: Sarvendra
authors.initials: S
authors.lastname: Kumar
authors.forename: M
authors.initials: M
authors.lastname: Khalid
authors.forename: M
authors.initials: M
authors.lastname: Shahid
mesh_terms: D002614:Chelating Agents / Q000737:chemistry / Q000493:pharmacokinetics*; D005290:Ferric Compounds / Q000737:chemistry* / Q000378:metabolism*; D008024:Ligands; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D008958:Models, Molecular; D015394:Molecular Structure; D013055:Spectrophotometry, Infrared
chemical_list: D002614:Chelating Agents; D005290:Ferric Compounds; D008024:Ligands