Spectral studies of Fe(III) complexes of dipodal tridentate chelating agents
摘要:
The dipodal ligands (lm) and (Blm) as well as complexes [FeLCl3] [L=lm (1) and Blm (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 Fe3+ where the ligands coordinate as a tridentate [N,N,N] chelating agent. Fe-57-Mossbauer spectral data confirmed the presence of a ligand asymmetry around Fe3+ 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. Crown Copyright (C) 2008 Published by Elsevier B.V. All rights reserved.
Spectral studies of Fe(III) complexes of dipodal tridentate chelating agents
摘要:
The dipodal ligands (lm) and (Blm) as well as complexes [FeLCl3] [L=lm (1) and Blm (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 Fe3+ where the ligands coordinate as a tridentate [N,N,N] chelating agent. Fe-57-Mossbauer spectral data confirmed the presence of a ligand asymmetry around Fe3+ 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. Crown Copyright (C) 2008 Published by Elsevier B.V. All rights reserved.